一、根据句意,填上合适的连接词。
1. They don't know ______ to go or wait.
2. She said ______ it wouldn't matter much.
3. He always thinks ______ he can do it better.
4. Jim told me ______ he didn't go fishing yesterday afternoon.
5. I want to know ______ you will come back at 8:00 tomorrow.
6. We are talking about ______ we'll go back tomorrow.
7. I am sure ______ you are very busy these days.
8. Sometimes I'm careless. I wonder ______ I can be more careful.
9. We haven't decided ______ we'll go back tomorrow.
10. Sandy is asking ______ Millie will come. ______ she comes, please call her.

whether
; that
; whether/if
; that
; if/whether
; whether
; that
; if/whether
; whether/if
; whether
; If

二、将下列句子改写成含宾语从句的复合句。
1. I can't decide whether to take part in the activity.
I can't decide __________ __________ __________ take part in the activity.
2. Jeff asked his students, “Do you know it is important to protect the Earth?”
Jeff asked his students __________ they __________ it is important to protect the Earth.
3. “Will Tom be willing to help me?” I can't stop wondering.
I can't stop wondering __________ __________ __________ be willing to help me.
4. “It can be dangerous to swim here,” the policeman warned us.
The policeman warned us __________ __________ __________ be dangerous to swim there.
5. “Someone is waiting for you outside,” Mr Wu said to me.
Mr Wu __________ me __________ someone __________ waiting for __________ outside.

if/whether
; I
; should
; if/whether
; knew
; if/whether
; Tom
; will
; that
; it
; could
; told
; that
; was
; me

( )1.(2023·江苏镇江八校一模)We cannot rule out the possibility ______ climate change is not the result of human activities.
A. whether
B. how
C. that
D. why

C

( )2. Before you ask someone for help, find out ______ he is the right person for your problem.
A. since
B. that
C. whether
D. unless

C

( )3. In the past, people didn't know that the Earth ______ around the Sun.
A. will move
B. moved
C. would move
D. moves

D

( )4.(2023·江苏苏州高新区一模)—How wonderful the school science festival is! I wonder ______ our school will hold it next year. —Sure. It's our tradition.
A. how
B. if
C. where
D. why

B