The boy often gives a satisfactory answer to the teacher’s question，__________ j
题型：不详难度：来源：
The boy often gives a satisfactory answer to the teacher’s question，__________ just a minute.
So he’s usually the teacher’s pet.| A．thought | B．having thought | | C．and to think | D．thinking |
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答案
| B |
解析
| -ing形式短语作状语,且think(思考)表示的动作发生于give a satisfactory answer之前,故用having thought。 |
举一反三
The policeman came up to the lonely house with the door __________，__________there for a while and then entered it.| A．open；to stand | B．opening；stood | | C．open；stood | D．opened；standing |
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__________along the quiet road at forty miles an hour，and then an old man suddenly started to cross the road in front of me.| A．Driving | B．I was driving | | C．Having driven | D．When I was driving |
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Mr.Smith was much surprised to find the watch he had had__________was nowhere to be seen.| A．repairing | B．it repaired | | C．repaired | D．to be repaired |
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What did the librarian__________out of the library?| A．permit to take | B．forbid to be taken | | C．allow to take | D．insist being taken |
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—Mum，why do you give me so much popcorn?
—__________the boring time.| A．Kill | B．Killing | | C．To kill | D．Having killed |
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