To save class time, our teacher has ________ students do half of the exercises in class and complete the other half for our homework.
______ your help, we would never have been able to get out of trouble.
What you said at the meeting was not ______.To many audience, it was totally out of place.
— What do you think of the film “Avatar”? — ______ it with “2010”, I have ______ the former.
We must work hard to _____ a good knowledge of English.
Who else can I depend on for help, if not ______?