Do you know the girl _________ is singing in the classroom?
A. when B. who C. which
—Be quiet, Mr. Smith is coming.
—Don’t worry. It _____ be him. Mr. Smith is much taller.
A. mustn’t B. must C. can’t
—_____ will your English teacher come back?
—In two days.
A. How often B. How long C. How soon
Boys and girls, the books in the library should______ good care of.
A. take B. are taking C. be taken
—How do you go to school every day?
—____ bus. I think it is good for the environment to take a bus.
A. On B. At C. By
— Which do you prefer, green tea or coffee?
—________, thanks. I'd like a glass of water.
A. Either B. Neither C. Both
