题目内容
【题目】The lion _______ the net with his sharp teeth, but that_______ help.
A.bite; doesn't
B.bite; didn't
C.bit; didn't
【答案】C
【解析】句意：狮子用锋利的牙齿咬着网，但这无济于事.本句用一般过去时，bite过去式bit,后半句是否定句，助动词否定形式是didn't.故选C.
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