The schoolmaster rang up ______.A．the policeB．the rescue partyC．the Air ForceD．the doctor

He __________ a book when the telephone rang.A、was readingB、readC、reads

I was watching TV_____ the telephone rang.A. whileB. whenC. since

No sooner had I locked the door______the telephone rang.A．whenB．afterC．thanD．as

We covered a wide______of topics in the interview.A．extentB．collectionC．rangeD．content

_____ had we entered the room when the telephone rang .A.AlmostB.No soonerC.HardlyD.Ju

In our class, when the bell rang and the teacher closed his book, it was a___________