When you are reading make a note of you think is of great importance.A. whichB. thatC. wh

问题补充：

When you are reading，make a note of you think is of great importance.

A. which

B. that

C. what

D. when

答案：

A. which

B. that

C. what

D. when

解析：C

解析宾语从句中you think是插入语，从句中缺少主语，which意思不对，故选what。