---- ______ you ever ______ aboard ?--- Yes, but only once.
| A．Do ,travel | B．Have traveled |
| C．Did travel | D．Were traveling |
相关试题
The teacher always reads a story for the children ________ a day.
| A．in the end | B．at the end of |
| C．in the end of | D．by the end of |
—How long have your family lived in the new flat, Jill?
—________ 2011.
| A．Before | B．In |
| C．After | D．Since |
—Hello, could I speak to Sam?
—Sorry, he ________ Australia.
| A．has been to | B．has been in |
| C．has gone to | D．has been at |
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