I warned him of the slippery road, but he fell on fours ________ I finished my w

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I warned him of the slippery road, but he fell on fours ________ I finished my words.[     ]
A. as
B. before
C. until
D. since

答案

举一反三

The boy was so tired that he fell asleep ________ his mother could take off his clothes.[     ]
A. before
B. after
C. while
D. when

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I couldn"t help applauding for Liu Xiang"s excellent performance ________ he got the first prize on the
stage in the 16th Asian Games.[     ]
A. for the first time
B. suddenly
C. the moment
D. once

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—Have you got your new job yet, Bob?
—Kind of. But the interviewer said they needed a reference from my former employer ________ they
    could give me a definite offer.[     ]
A. until
B. when
C. once
D. before

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You can, ________ the sky is clear, see as far as the old temple on top of the mountain, but not today.[     ]
A. because
B. though
C. for
D. when

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It was a long time ________ the miners in Chile were rescued from under the mine.[     ]
A. until
B. when
C. before
D. since

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