157. Is this the reason _____ at the meeting for his carelessness in his work? (2002上海春)

　 A. he explained　　　　 B. what he explained　　 C. how he explained　　　 D. why he explained

156. He is one of the students who _____ winners of scholarship for three years.

　 A. is 　　　　　　　　　　　 B. are　　　　　　　　　　　　　 C. have been　　　　　　　　 D. has been

155. He is the only one of the students who _____ a winner of scholarship for three years. (2002上海春)

　 A. is 　　　　　　　　　　　 B. are　　　　　　　　　　　　　 C. have been　　　　　　　　 D. has been

154. _____, I have to put it away and focus my attention on study this week. (2004上海春)

　 A. However that story is amusing　　　　　　　　　 B. No matter amusing the story is

　 C. However amusing the story is　　　　　　　　　　 D. No matter how the story is amusing

153. He left a message _____ you should call back this afternoon for the doctor’s appointment.

　 A. until　　　　　　　　　　 B. if　　　　　　　　　　　　　　 C. when　　　　　　　　　　　 D. that

152. I would appreciate it _____ you call back this afternoon for the doctor’s appointment. (2003上海春)

　 A. until　　　　　　　　　　 B. if　　　　　　　　　　　　　　 C. when　　　　　　　　　　　 D. that

151. -- Was his father very strict with him when he was at school?

　　 --- Yes. He even didn’t praise him _____ he had become one of the top students in his grade.

　 A. after　　　　　　　　　　 B. unless　　　　　　　　　　　 C. until　　　　　　　　　　　　 D. when

150. -- Was his father very strict with him when he was at school?

　　 --- Yes. He will never praise him _____ he becomes one of the top students in his grade.

　 A. after　　　　　　　　　　 B. unless　　　　　　　　　　　 C. until　　　　　　　　　　　　 D. when

149. --- Was his father very strict with him when he was at school?

　　 --- Yes. He had never praised him _____ he became one of the top students in his grade. (2003北京)

　 A. after　　　　　　　　　　 B. unless　　　　　　　　　　　 C. until　　　　　　　　　　　　 D. when

148. John shut everybody out of the kitchen. It seemed _____ he wanted to prepare a grand surprise for the party.

　 A. which　　　　　　　　　 B. when　　　　　　　　　　　 C. so that　　　　　　　　　　　 D. as if