When the teacher came in the students pretended the text.A. to readB. to be readingC. to

问题补充：

When the teacher came in, the students pretended the text.

A. to read

B. to be reading

C. to have read

D. having read

答案：

A. to read

(答案→)B. to be reading

C. to have read

D. having read

解析：考查不定式用法。不定式的一般式to do表示与位于动词同时发生，或者稍后发生；不定式的进行式to be doing 表示与位于动词同时发生。不定式的完成式表示在谓语动词之前就发生。句意：当老师进来的时候，学生假装在读书。根据句意说明两个动作是同时发生的，故使用不定式的进行式。故B正确。