Question

Alice has been in China for several years. She ________ be a big girl now.

A. need
B. must
C. can
D. may

Answer 1

答案B
根据上句“艾丽丝在中国已经好几年了”，那么“她现在一定是一个大姑娘了”，表示十分肯定的推测，用must be。