Leave your key with your neighbor ________ you lock yourself out one day. [

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Leave your key with your neighbor ________ you lock yourself out one day. [     ]
A. as long as
B. even though
C. in case
D. as if

答案

举一反三

Once ________ in the forest, you ought to remain ________ you are waiting for help. [     ]
A.losing; where
B. losing; there
C. lost; there
D. lost; where

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— You look unhappy, my son?
— I"m wondering how long it"ll be ________ we come to China again. [     ]
A. since
B. when
C. before
D. after

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— Why didn"t you chat with that friendly foreigner just now?
— I"d like to, but the trouble was ________ he said was difficult for me to understand. [     ]
A. what which
B. that what
C. that that
D. what that

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It suddenly occurred to him________ he had left his keys in the office.        [     ]
A. whether
B. where
C. which
D. that

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The limits of a person"s intelligence, generally speaking, are fixed at birth, but ________ he reaches these
limits will depend on his environment. [     ]
A. where
B. whether
C. that
D. why

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