单项选择题

With the old man () the way, we had no trouble in finding that mysterious cave.

A. leading
B. led
C. lead
D. to be led

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单项选择题

John left home twenty minutes ago. It is usually half an hour’s drive from his home to the office here. So he () soon.

A. should have arrived
B. need arrive
C. must have arrived
D. may arrive

单项选择题

According to the writer, if a person finds getting up early a problem, most proba-bly ()

A. he refuses to follow his own energy cycle
B. he is a lazy person
C. he is not sure when his energy is low
D. he is at his peak in the afternoon or evening