When changing lanes, a driver should use his turning signal to let other drivers know_

Question

When changing lanes, a driver should use his turning signal to let other drivers know_____ .

A. he is entering which lane

B. which lane he is entering

C. is he entering which lane

D. which lane is he entering

Answer 1

正确答案：B

which引导的句子做know的宾语，句子用陈述语序。