16. Zhang, we _______playing the tape recorder so loudly after midnight. It could be a great disturbance to our neighbors.

　　A don’t suppose                  B are not supposing

　　C supposed to be not              D are not supposed to be

　　17. I have been to the doctor’s about my headache. He says there is _______ , but I must lie up for a few days.

　　A something serious                B anything serious

　　C not serious                      D nothing serious

　　18. ________ four years since John left school.

　　A They have been         B It is           C It was               D Those are

　　19. Hurry up! We have _______ to spare.

　　A the little time.          B a little time             C few times          D little time

　　20.You went to the wrong shop. You ___to the shop next to the cinema, but you went to the shop by the post office.

　　A ought to                      B ought to have gone

　　C ought to be going               D ought go

　　16. 正确答案：D

　　例题解析：be not supposed to do sth. 表示禁止做某事

　　17. 正确答案：D

　　例题解析：修饰不定代词 something, anything, nothing 的形容词应置于其后，本句又表达的是否定意思，故选D

　　18. 正确答案：B

　　例题解析： since 引导的时间状语从句的主句使用一般现在时或现在完成时

　　19. 正确答案：D

　　例题解析：根据题意为没有多少时间， few修饰可数名词

　　20. 正确答案：B

　　例题解析：ought to/ should +动词的完成式表示过去该做某事而未做