1 . 根据句意，从方框内的选项中选出可以填入空白处的最佳选项。选项中有两项为多余选项。

A. have in common       B. pick up       C. turn your back on       D. at your convenience       E. focus on F. run out of       G. at a loss       H. a variety of       I. break down       J. on account of K. in preparation for       L. breathe in

1. We delayed our departure ______ the bad weather.
2. We should put aside our differences and discuss the things we ______ .
3. How can you ______ me when I am in difficulty?
4. Moved by their speech, I was ______ what to say.
5. The whole class is working hard ______ the next exam.
6. This printer is of good quality. If it should ______ , we would repair it for free.
7. We drive to the airport the next morning to ______ Susan.
8. This not only helps you ______ a project, but it also helps you plan your time.
9. I’d appreciate it if you could do me a favor ______ .
10. They come from ______ different backgrounds.