He walked directly towards her and spoke to her in a low voice to avoid by others.A. to

问题补充：

He walked directly towards her, and spoke to her in a low voice to avoid by others.

A. to hear

B. hearing

C. to be heard

D. being heard

答案：

A. to hear

B. hearing

C. to be heard

(答案→)D. being heard

解析： 非谓语动词。考查avoid doing sth 避免做某事。故排除A C项，再根据题意，他直接走向她，小声跟她说话，避免其它人听到。故选D项。

考点 非谓语动词。