Some passengers were walking through one of the big halls at De Gaulle Airport _

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Some passengers were walking through one of the big halls at
De Gaulle Airport _____ the whole roof (屋顶) fell down. [ ]
A. while
B. as soon as
C. when
D. after

答案

举一反三

—When did your father come back last night?
—He didn"t come back _____ he finished all the work. [ ]
A. until
B. while
C. if

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My grandma didn"t go to sleep _____ I went back home. [ ]
A. where
B. until
C. as soon as
D. while

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Fei Junlong and Nie Haisheng said, "_____ we didn"t see the Great Wall,
we felt excited when we passed over China." [ ]
A. Because
B. If
C. Although
D. As

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—It"s 9 o"clock now. I must go.
—It"s raining outside. Don"t leave _____ it stops. [ ]
A. when
B. since
C. while
D. until

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I don"t know _____ my sister loves the MP3 _____ not. [ ]
A. if; but
B. whether; not
C. as; or
D. whether; or

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