—Look at the picture on the wall. It be David’s.—Yes his name is on the first page.A. can

问题补充：

—Look at the picture on the wall. It be David’s.

—Yes, his name is on the first page.

A. can

B. can’t

C. must

D. mustn’t

答案：

A. can

B. can’t

(答案→)C. must

D. mustn’t

解析：根据后文的内容his name is on the first page.可知答案为C，表示一定是

···，