The largest city in Canada is ______.

单项选择题The phenomenon that words having different meanings have the same form is called ______.

单项选择题I（）have watched that movie--it'll give me horrible dreams.

A. shouldn' t
B. needn' t
C. couldn't
D. mustn't

单项选择题I was impressed______the efficiency of the work done in the company.

单项选择题I' m calling to enquire about the position（）in yesterday' s China Daily.

A. advertised
B. to be advertised
C. advertising
D. having advertised

单项选择题—When shall we restart our business —Not until we（）our plan.

A. will finish
B. are finishing
C. are to finish
D. have finished