1、 What did the teacher say just now?
He asked the stuednts ___.
A when they had cleaned the classroom
B.where they had spent their May Day Holiday
C.how long they have been collecting shells
AB都可.这是间接引引语,所以不用C
A他们什么时候扫教室（问之前扫了,had cleaned)
B他们在什么地方过五一假期（问之前过了,had spent)
2、I want to know whether ___.
A.will he give back the book
B.he gives back the book
C.he will return back the book
D.he has returned the book
答案D
A语序不对,B经常给?C多了个back,去掉back也对
3、I wonder ___ poor Li Ming has passed that exam.
Of course not.He is so lazy.
A why
B whether
C how
Dthat
答案B
whether是否的意思.
如果用why,那就是为什么考试已过.意思不对.how也是意思不对的意思.