问题描述:
The river is very wide.None of us ( ) swim across it .A.can B.could C.be able to D.able to
When the boat sank,he ( )swim to the bank.
A.can B.could C.was able to D.is able to
When the boat sank,he ( )swim to the bank.
A.can B.could C.was able to D.is able to
问题解答:
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