By the end of last month, I _____ all the CDs of Justin Bieber.

A) collect     B) collected     C) have collected     D) had collected

用括号内所给动词的适当形式填空
【小题1】She ___(write) twenty pop songs which are liked by fans by the end of last year.
【小题2】________(quarrel) with others isn’t good manners for everyone.
【小题3】－         the price           (include) coffee and hamburgers?
－I’m afraid not.
【小题4】The teacher told us that three quarters of our earth         (cover) by water.
【小题5】Everyone knows that the disabled mustn’t __________ (laugh) at
【小题6】We should try our best to prevent the air pollution                (live) a happy life.
【小题7】With all lights on, the hall______ (become) as bright as day when we arrived.
【小题8】How soon do you think we            (get) to the hotel?
【小题9】Mr. Green told me that his family        (go) for a holiday the next week.
【小题10】–Did you see him come in just now?

 We ______ four thousand new words by the end of last year.