141. He's worked here _______ 4 o'clock this afternoon.

A. for　 B. at　　 C. since　 D. about

140. It happened ________ a winter night.

A. at　　 B. on　 C. in　　 D. for

139. He said that he would go to London ________.

A. the next month　　 B. last month　 C. the month before　 D. next month

138. When I came into the room, I saw him _______ his homework.

A. did　 B. does　　 C. doing　 D. to do

137. They asked me _______ finish my homework.

A. when I could　 B. I when would　 C. When I can　 D. When could I

136. The students ______ trees if it ______ raining tomorrow.

A. will plant, will stop　 B. will plant,　 stops　

C. plant, will stop　 D. plant, stops

135. Your hands ______ before meals. They are too dirty.

A. must wash　 B. can wash　

C. must be washed　 D. can be washed

134. Granny told the girl the moon ______ in the west.

A. goes down　 B. went　 down　 C.　 is going down　 D. was going down

133. ________ will your sister be back ?　 In about two hours.

A. How　　 b. How often　 C. How long　 D. How soon

132. There is a small village ______ the two rivers.

A. during　 C. among　 C. between　　 D. in