____ for a long time, but he managed to catch up with his classmates at last.
| A．Having been ill | B．Being ill | C．He was ill | D．Though ill |
相关试题
Mary and I see each other ________, but not as often as we used to. 
| A．sooner or later | B．once in a while | C．in the end | D．more or less |
I was out of town at the time, so I don’t know exactly how it _______. 
| A．was happening | B．happened | C．happens | D．has happened |
It saves tome in the kitchen to have things you use a lot _______ easy reach. 
| A．near | B．upon | C．within | D．around |
------shall we have our picnic tomorrow?
-----______it doesn’t rain.
| A．Until | B．While | C．Once | D．If |
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