Jack wasn"t saying anything, but the teacher smiled at him ____ he had done s

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Jack wasn"t saying  anything, but the teacher smiled at him  ____  he had done something very  clever.    [     ]
A. as if
B. in case
C. while
D. though

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举一反三

They are talking about Rome____they had been there  before.   [     ]
A. even if
B. if
C. as though
D. as

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_____ he had not hurt his leg, John would have won the race.        [     ]
A. If
B. Since
C. Though
D. When

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We"ve offered her the job,but I don"t know  _____ she"ll accept it.     [     ]
A. where
B. what
C. whether
D. which

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The reason why he failed is _____ he was too careless.    [     ]
A. because
B. that
C. for
D. because of

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将下列句子改为含有宾语从句的复合句。1. Does Mr Brown enjoy living in China? Could you tell me?
Could you tell me _____ Mr Brown _____ living in China?
2. "No news is good news. "he said. He said _____ no news _____ good news.
3. Who invented TV set? I don"t know. I don"t know ______ _____ TV set.
4. " Does the girl need any help?" he asked me. He asked me _____ the girl ____ some help.

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