Xiao Li has worked here_____ he came here. [ ]A. when B. befor

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Xiao Li has worked here_____ he came here.   [     ]
A. when
B. before
C. since
D. while

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举一反三

Peter likes reading a newspaper _____ he is having breakfast.  [     ]
A. until
B. while
C. because
D. though

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It is known to all that you exercise regularly, you won’t stay in good health.[ ]
A. unless
B. if
C. until
D. as

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We didn"t enjoy the day ______ the weather was so awful.[     ]
A. until
B. because
C. unless
D. even though

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______ you have passed your English exam, you should study hard. [     ]
A. If
B. Even though
C. Because
D. Unless

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Mary always tells lies. _____ she says, nobody will believe her.        [     ]
A. Whatever
B. Whenever
C. Wherever
D. However

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