As I was sitting down for dinner the telephone ring.A. shouldB. mustC. couldD. would

问题补充：

As I was sitting down for dinner,the telephone ring.

A. should

B. must

C. could

D. would

答案：

A. should

(答案→)B. must

C. could

D. would

解析：句意，正当我坐下来用晚餐时，偏偏电话铃响了。表示说话人对主语发出的动作或行为是不希望的、不满的甚至生气的，用must。