问题

ept his head _____ water when hebegan to learn swimming, but he raised his head now and then

A:are written
B:are writing
C:is written
D:is writing

正确答案是：

同类题型

It was a year ago __________ I started working here.[ ]

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asgone to California—Oh, can you tell me when he

Though I drank too much,I drove back home .

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