We often see Betty ____ the old man with his housework.
A. help B. to help C. helped D. helping
In our city, _____ middle school students want to work as a teacher in the future.
A. thousand B. thousand of
C. thousands of D. two thousands of
I found _____ necessary to save energy and protect the environment.
A. that B. this C. it D. one
________ beautiful these postcards are! Where did you get them?
A. What a B. How a C. How D. What
We can’t do well in examinations we study hard in school time.
A. if B. and C. since D. unless
Her son Coke, but now he milk.
A. used to drink, is used to drinking
B. used to drinking, drinks
C. is used to drinking, used to drink
D. is used to drink, is drinking
