1 . 我怀疑这首歌曲是否值得一听。
_______________________________________

2 . Is June a good time to visit Hong Kong?   I wonder. (合并为一句)
I wonder ________ ________ ________ a good time to visit Hong Kong.

3 . —I’m not sure ________ you eat vegetables every day.     
—I know ________ they are good for our health, so I eat them every day.

A．if; that

B．that; if

C．that; that

D．if; if

4 . Jim hasn’t decided ________ to go home by bus or by train.

A．if

B．that

C．how

D．whether

5 . Lin Hui asked me, “Do you help your parents with the housework?”（改为同义句）
Lin Hui asked me ____I ____ my parents with the housework.

6 . I don’t know ______________ (if) it will be fine tomorrow.

7 . —Could you tell me ________?
—Certainly.

A．how long you will leave	B．if the air is badly polluted
C．whether you had got ready for the exam	D．what’s the story about

8 . —The match is so exciting. The opposite team is really strong.
—Yes, I doubt ________ our team will win or not.

A．if

B．that

C．whether

D．why

9 . Does the earth go around the sun? Susan wanted to know.(合并为一句)
Susan wanted to know _______ the earth _______ around the sun.

10 . It’s amazing! I can’t believe ________ you could make it to the top in such a short time!

A．which

B．what

C．that

D．if