Do you know ________ back soon?A.when she will come B.if she will come 此题应该选什么?为什么?

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Do you know ________ back soon?A.when she will come B.if she will come 此题应该选什么?为什么?

Do you know ________ back soon?A.when she will come B.if she will come 此题应该选什么?为什么?
Do you know ________ back soon?A.when she will come B.if she will come 此题应该选什么?为什么?

Do you know ________ back soon?A.when she will come B.if she will come 此题应该选什么?为什么?
B.if she will come
soon 本身就是时间状语,故不用when

答案选B.if she will come
你知道她是否将要快回来了?

B.if she will come
句中有时间soon所以不选A