I don"t know_________ cat this is. [ ]A. who B. whom C. when D. whose

题型：同步题难度：来源：

I don"t know_________ cat this is.  [     ]
A. who
B. whom
C. when
D. whose

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举一反三

I don"t know __________ book this is.  [     ]
A. who
B. whom
C. who"s
D. whose

题型：同步题难度：| 查看答案

—Excuse me. Could you tell me____ later on?
—Wait a minute. It’s coming in ten minutes.[ ]
A. if the next train arrives.
B. if the next train will arrive
C. when the next train arrives
D. when will the next train arrive

题型：浙江省期末题难度：| 查看答案

-----How is the weather tomorrow?
-----I don"t know if it         tomorrow.
----Well, if it         , I won"t go for a picnic with you.        [     ]
A. will rain; will rain
B. will rain ;rains
C. rains ;will rain
D. rains; rains

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Could you tell me __________?[ ]
A. where do you live
B. who you are waiting for
C. who were you waiting for
D. where you live in

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—I don’t know _____.
—It doesn’t matter, just stay with us please.[     ]
A. when will the train reach
B. when the train will reach
C. when will the train arrive
D. when the train will arrive

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