Some old pots ______ clay were found lying ______ to the dead body.

单项选择题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