Robert is said ___________ abroad, but I don’t know what country he studied in .
| A．to have studied | B．to be studying | C．to study | D．to have been studying |
相关试题
Over the past 20 years, the Internet helped change our world in _____way or another for the better.
| A．any | B．one | C．every | D．either |
—Do you want another drink? 
——_______ .
| A．I don’t think so | B．No way | C．Not at all | D．I wouldn’t say no |
he doctor recommended that you______ swim after eating a large meal.
| A．wouldn’t | B．couldn’t | C．needn’t | D．shouldn’t |
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