6. “Can’t you read?” Mary said __________ to the notice.

　 A. angrily pointing　　　　　　　　 B. and point angrily

C. angrily pointed　　　　　　　　 D. and angrily pointing

5. If you can’t find him at home, you had better __________ him at work.

　 A. call on　　　 B. call at　　 C. on a visit　　 D. drop in

4. ________ reference books are missing in our school library is large.

　 A. A number of　　　　　　　　　　 B. The number of　

C. A great deal of　　　　　　　　　 D. A lot of

3. On each side of the street ________ a lot of trees.

A. stands　　 　　B. grow 　　　　C. is standing　 　D. are grown

2. Crusoe held up a ________ candle to ________ the room.

A. lighted; lit　　 B. lit; light 　　C. lighted; light　 　D. lit; give light

1. Little Franz wasted days and months when he _________.

A.　　　 should study　 　　　　　B. must study 　　

C. should have studied　　 　　D. must have studied