—Bob has gone to California.—Oh, can you tell me when he ________?[ ]A. has

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—Bob has gone to California.
—Oh, can you tell me when he ________?[     ]
A. has left
B. left
C. is leaving
D. would leave

答案

举一反三

In 1492, Columbus ________ on one of the Bahama Islands, but he mistook it for an island off India.[     ]
A. lands
B. landed
C. has landed
D. had landed

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—I"m trying to find yesterday"s newspaper. Have you seen it?
—I"m afraid that I ________ it away. I thought you had finished reading it.[     ]
A. threw
B. had thrown
C. throw
D. will throw

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Excited to see you back safe and sound from Libya. How long ________ in Libya?[     ]
A. have you stayed
B. did you stay
C. had you stayed
D. would you stay

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—Where have you been recently?
—I ________ in Beijing on business for a week last month.[     ]
A. have worked
B. was working
C. have been working
D. worked

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—Haven"t I told you that you should be home earlier?
—Yes, but I ________ home earlier than I usually do.[     ]
A. was coming
B. will come
C. came
D. had come

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