1. Do first things first.
2. Do the first things first.
(Which one is right?)
3. What kinds of health problems does the people in the pictures have?
Look at the person in Picture One. He is holding a measuring tape. Doesn't he look heavy? He needs to be on a diet. How can we help him? Find the solution on the Internet. Ask if your friend has a problem and give a suitable solution. (Is this passage grammatical? Would you like to check it? Thank you.)
1 and 2 are both correct; 1 is more commonly used.
3. What kinds of health problems dothe people in the pictures have?
Look at the person in Picture One. He is holding a measuring tape. Doesn't he look heavy? He needs to be on a diet. How can we help him? Find the solution on the Internet. Ask if your friend has a problem and give a suitable solution.
Only that verb needed correcting; everything else reads well.
"do" and "the" should have a space between them! =)
In the first question, "Do first things first" is the correct phrasing. This phrase is commonly used to emphasize the importance of prioritizing tasks and completing them in the order of their importance.
Regarding the second question, the passage provided contains grammatical errors and could be improved. Here's a revised version:
"What kinds of health problems do the people in the pictures have? Let's analyze Picture One. In the picture, the person is holding a measuring tape and appears to be overweight. It is necessary for him to follow a diet to address this issue. We can find suitable solutions on the internet. Additionally, we can also ask our friends if they have any health problems and provide them with appropriate advice to help them."
Remember that it's always a good idea to proofread your writing, especially when asking for help.