After that, he knew he could ________any emergency by doing what he could to the best of his ability.

(2013·吉林长春高中毕业班第一次调研)Many athletes are clear that the Olympic Games are the only time ________ they will be watched by thousands of millions.

Did Peter fix the computer himself?— He _____, because he doesn’t know much about computers[ ]

His sister left home in 1998, and__________ since

You don’t think I’m going out in such wet weather, ?