It also awards me _____opportunity to learn American culture at _____ first hand.

Jane, have you finished yourpaper?—No, Imy sister with her homework all the morning

We sometimes have to meet some difficulties, but we should develop a good attitude _______ life

How many birds can you see in the trees—I can see ______ birds.

The opponents(对手) were ________ the ball for most of the match, and at last they won the game