that, he knew he could ______ anyemergency by doing what he could to the best of his ability

－Must I finish my homework today－No, you _____. You can finish it tomorrow.

It is at Christmas _____ thousands of young people go skiing in the mountain．

The photo brought me back to the memory of the time in Qingdao, _________ I spent my summer holiday by the seaside with my friends

You will never gain success________ you are fully devoted to your work.