问题

He was a good swimmer so he _____ swim to the river bank when the boat sank.[ ]

A: is able to
B: could
C: was able to
D: can

正确答案是：

同类题型

You know I’m having a hard time now. — Needn’t worry. If you can______ the present difficulties,everything should be all right.[ ]

Patrick has never learned a foreign language, .

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I’m sure Andrew will win the first prize in the final.-I think so. He________for it for months．[ ]

How long did you spend ______ this book —About two hours.