-Mary, what about going boating if it ___tomorrow.-Good idea.
A. not rain
B. will rain
C. doesn’t rain
D. won’t rain
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—Do you know _____ going to stay in London?—No, I don’t. Maybe a few days.
A. when he is
B. how long he is
C. when is he
D. how long is he
他很小的时候就会骑自行车了。He was able to ride a bike _____ he _____ very young.
他没有听见敲门,因为他正在听收音机。He didn’t hear the knock at the door ________ he______ ______ _______ the radio.
直到我叫他的名字,他才看见我。He _____ _____ me _____ I called his name.