—WhereisMr.Liatthemoment?—He

问题详情：

—Where is Mr. Li at the moment?

—He __________ in the classroom just now. He __________ be there now.  

A. heard to sing, may                            B. was heard sing, must 

C. heard sing, must                         D. was heard to sing, may

【回答】

D

知识点：相似 相近词比较

题型：选择题