【题目】—What do you think of Betty?
— Lovely, though she ______ be naughty sometimes.
A.should
B.must
C.can
D.need

【答案】C
【解析】考查情态动词。A. should应该；B. must必须；C. can能；D. need 需要；句意：我认为贝蒂如何？很可爱，尽管有时很调皮，故选C项。