l didn"t go to bed __ my mother came back. [ ]A. until B. w

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l didn"t go to bed      __   my mother came back.      [     ]
A. until
B. while
C. since
D. unless

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举一反三

I have seen that film three times          _ I really enjoy it a lot.          [     ]
A. because
B. although
C. so that
D. until

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He had to work hard to earn money______ his children were at college.    [     ]
A. as
B. after
C. while
D. before

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I don"t know          he will come here or not this evening.         [     ]
A. if
B. whether
C. weather
D. when

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Don"t be so angry with Sally, _____ ,she is only a little girl.[     ]
A. above all
B. after all
C. all in all
D. at all

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—It"s nine o"clock now.  I must go home.
—I"t"s raining outside. Don"t leave________it stops.        [     ]
A. when
B. after
C. while
D. until

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