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

2 . —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

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

A．if

B．that

C．how

D．whether

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

5 . —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

6 . —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

7 . —Do you know ________ The Betl and Road Forum(“一带一路”高峰论坛) began?
—On May 14^th, 2017.

A．that

B．when

C．if

D．where

8 . Do you know ________ he did not turn off the light?

A．what

B．how

C．if

D．why

9 . Oh, my god, I don’t know ________ or not I will have time to watch Jay Chow’s vocal concert(演唱会) tomorrow.

A．that

B．whether

C．whenever

D．if

10 . We never doubt ________ you will have a ________ future.

A．that; successful

B．if; successful

C．that; success

D．whether; success