We'd better set off now, or it will be dark _____we know it..

We'd better set off now, or it will be dark _____we know it.A. until B. after C. when D. before

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—What are you doing there? —I am tasting the soup. It ____..

—What are you doing there? —I am tasting the soup. It ______ wonderful.A. tastes B. tasted C. is tastingD. is tasted

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All the books in the list, _____ otherwise stated, will be a..

All the books in the list, _____ otherwise stated, will be available.A. as B. ifC. unless D. although

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He was so busy that _____ I could say hello to him he had ru..

He was so busy that _____ I could say hello to him he had rushed out of the room.A. when B. beforeC. since D. until

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— Professor Smith, some students want to have a talk with yo..

— Professor Smith, some students want to have a talk with you. ___ they wait here or outside?— Show them in now, please.A.Will B.ShallC.WouldD.Must

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