—IsTominthenextroom?—Well,it’shardtosay.ButIheardhim   ...

问题详情：

—Is Tom in the next room?

—Well, it’s hard to say. But I heard him        loudly when I passed by just now.

A. speak                                              B. to speak

C. spoken                                            D. speaking

【回答】

 D  结合语境及逻辑可知，应是经过时听到汤姆正在说话，hear sb. doing sth. 意为“听见某人正在做某事”，为固定用法。

知识点：动词和动词短语

题型：选择题