题目内容
Was in 8 o'clock ________ you heard someone ________at the door?
[ ]
A．when; knocking
B．when; knock
C．that; knocking
D．that; knock
答案：A
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B．when was it that she came |
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C．when she came |
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D．when it was that she came |
– Do you know _____ yesterday ?
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| A．when did she come |
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| D．when it was that she came |