Sarah knew nothing about it _________her sister told her. [ ]A. becau

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Sarah knew nothing about it _________her sister told her.        [     ]
A. because
B. if
C. unlil

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举一反三

-It"s 10 o"clock. I must go now.
-It"s raining outside. Don"t leave __________ it stops.[ ]
A. when
B. since
C. while
D. until

题型：期末题难度：| 查看答案

__________ he got up early, he _________ the early bus.  [     ]
A. Because; missed
B. Since, lost
C. Though; missed
D. As; lost

题型：同步题难度：| 查看答案

___________ Tracy became seriously ill, she still went on working.     [     ]
A. If
B. Unless
C. And
D. Even though

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Lillian doesn"t know _____ she should bring a present.[     ]
A. if
B. whom
C. as
D. what

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—Mom, why do you pour the food?
—Never eat food that stays  overnight (过夜的) , ______ it tastes ______ .   [     ]
A. if; good
B. but; well
C. even though; good
D. even if; well

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