I left my umbrella in my room.Could you wait _____ I go back to get it?[ ]A.

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I left my umbrella in my room.Could you wait _____ I go back to get it?[     ]
A.when
B.if
C.while
D.before

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举一反三

The sports meet will continue_____ it rains this afternoon.[     ]
A. if
B. since
C. as soon as
D. unless

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Nobody can learn English well _____ you work hard on it.[ ]
A. if
B. unless
C. when
D. but

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I didn"t know anything about it_______my father told me. [     ]
A. until
B. because
C. if
D. after

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Miss Zhao is very helpful. She often helps us ____we are in trouble.  [     ]
A. whether
B. although
C. whenever
D. however

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—Why do you like koala bears?
—___ they are cute and smart. [ ]
A. And
B. For
C. Because
D. so

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