The Chinese teacher looks so pale. She be ill.A. mustB. mustn’tC. canD. need

问题补充：

The Chinese teacher looks so pale. She be ill.

A. must

B. mustn’t

C. can

D. need

答案：

(答案→)A. must

B. mustn’t

C. can

D. need

解析：must 意为:一定.表示推测; mustn’t意为:不准; can表能力; need意为:必须.