Lucy’s colour blue because she likes to be the leader so it red.A. can’t be; must be B.

问题补充：

Lucy’s colour blue because she likes to be the leader, so it red.

A. can’t be; must be

B. can’t be; mustn’t be

C. should be; must be

D. must be; can’t be

答案：

(答案→)A. can’t be; must be

B. can’t be; mustn’t be

C. should be; must be

D. must be; can’t be

解析：A 考查情态动词。can’t译为“不可能”表否定的推测，must“一定”，表肯定的推测。“Lucy的颜色不可能是蓝色，因为她喜欢做领导者；所以，她的颜色一定是红色。”