Unit 2 We have celebrated the festival since the first pioneers arrived in America教学课件

一、选择。
1. He?will?spend?six?hours?at?his?desk____ he?finishes?his?composition.?
A. before B. until? C. after D. when
2.I?knocked?at?the?door?for?more?than?five?minutes___ Mrs.?White?answered?it.?
A. until B. when C. after D. before
3. He?was?about?to?go?to?bed?________?the?doorbell?rang.?
A.?while? B.?as ?C.?before? D.?when
4. _____?John?was?watching?TV,?his?wife?was?cooking.?
A.?As? B.?As?soon?as? C.?While? D.?Till
5. –What?was?the?party?like??
– Wonderful.??It’s?years _____?I?enjoyed?myself?so?much.
A.?after???B.?before???C.?when???D.?since