Write an article based on this "Write more formally if the recipient is in a position of authority. Take an informal tone if you know the recipient well. Keep business letters courteous and professional. Adjust your tone to reflect your familiarity with the recipient. Use a more formal tone whenever you have doubts."
article: Use the formal second-person pronoun usted (or ustedes, if your letter is addressed to more than one person) when writing to someone older than you, or who is in charge of something. If you're making a request or seeking confirmation of something, you would almost always use formal language. For example, if you're writing a letter to confirm your hotel reservations, write formally. If you're writing to someone younger than you, or to a close friend or family member, you'll typically use informal speech. Address them with the second-person pronoun tú.  If your letter is addressed to more than one person, use the second-person plural pronoun ustedes – unless you're writing to someone in Spain. Spaniards use an informal second-person plural pronoun, vosotros.  You may want to maintain a formal tone if the recipient is significantly older than you, even if you know them well. For example, if you were writing a letter to your grandmother, you would probably use usted rather than tú in your letter, even if you were very close to her. She is older, and the formal pronoun indicates respect. A more formal tone is appropriate for business letters, even if you're writing to a friendly colleague. If the letter has a business purpose, it may be shared with others you don't know, or kept in business records. Keep personal inquiries or information out of a business letter. For example, if you're writing to a co-worker you're friends with about a work-related matter, you wouldn't ask them about their plans for their upcoming birthday. If you're writing a personal letter, you may use more casual and affectionate language – even if you're using formal pronouns. However, if the person you're writing to is a stranger, you would typically refrain from being causal or affectionate. While the specific words are different, the same concept applies in English. You wouldn't write a letter to a company asking for a job and sign it "with love." Likewise, when ending a letter in Spanish, choose a closing that falls in line with the purpose of your letter and your familiarity with the recipient. Spanish is generally a more formal language than English. If you can't decide what tone to use, err on the side of formality. No one will fault you for writing too formally. However, a letter that's too casual could send the wrong impression. For example, if you used the pronoun tú in a cover letter to apply for a job, you'd likely not get called for an interview – even if you were highly qualified for the position.

Write an article based on this "Prepare your mortar mix. Start laying bricks  at the corners. Fill in the rows. Spread a layer of gravel inside the bricks. Pour a layer of concrete on top of the gravel."
article: You’ll need to have this ready to start laying bricks. Follow the instructions on the mix package, and keep the prepared mortar near your work area so it’s easy to reach. Use bonding cement (prepared to package instructions) rather than mortar if you are making a grill from concrete blocks. Put a line of mortar down just inside the outline on the footer, then lay down some bricks at all the the corners. Don’t forget to put 0.5 inches (13 mm) of mortar between each brick. Build the corners up four courses high.  To build up each course, smear a layer of mortar (about the thickness of your finger) on top of the bricks on the ground. Lay new bricks on top of the mortar so that they overlap the old ones and create an interlocking pattern. Repeat. If you are using concrete blocks, you only need to build up two or three courses at this point. Work from corner to corner. Make sure to put some mortar down on the top of each course of bricks before laying the next one down. Continue to leave 0.5 inches (13 mm) of mortar between each brick as well. You’ll now have a rectangle that is four full courses high. Wait for the mortar to dry before moving on to the next steps. You can use any ordinary gravel mix that’s available. The type of gravel is not as important as making sure that the footer on the interior of the brick square you have created is covered by a thin layer of it. Prepare more concrete mix. Lay a 4 inches (100 mm) slab on top of the gravel you poured inside the brick rectangle. This creates a barrier of insulation between the fire and ground.

Write an article based on this "Open the "Rewards" tab. Pick a reward. Look out for special promotions."
article:
Once you've earned a few hundred points, navigate to the Rewards section of the app to browse your options. Bear in mind that you will need a few thousand points, at least, to reach even a $5 PayPal deposit. Possible rewards include PayPal deposits, Amazon gift cards, and iTunes gift cards. If you have enough points, you may even be able to afford a device like an iPad Mini.  Don't wait too long! Be aware that points expire. If you do not download an app for 60 days, then your unspent points will be reset to zero.  Choose wisely. There are no refunds. Once you spend your points, there's no turning back. Sometimes there are special drawings in which each time you download an app, you are entered for a chance to win. The chances may be slim – but you never know when a small effort will pay off!