1.In my opinion, his reason of his action was false

2. The proposal looks good in theory, but it's worthless in practice

3. I think he left his briefcase there by accident, but actually he did it on purpose

4.Please make your request in writing, and send to us by post

5.I'm very grateful of you for all your help and support

6. For the time being, Mr. Johnson is in charge of the planning department

7. Did you do to Chicago on your own, or with friends?
8. If you're in difficulties with anything, we'll help you by all means
9. When I stood under a tree, an apple fell on my head
10. Quite by on chance i noticed that their house was rightarrow for sale.