1 . _____ sun is shining.

A．The

B．A

C．An

2 . —Bill, do you have a dream?
—Yes. I wish to go to _________ moon one day.

A．a

B．an

C．the

D．/

3 . What can we do to protect ________ Earth?

A．a

B．an

C．the

D．/

4 . China has set a goal of sending astronauts to ________ moon.

A．a

B．an

C．the

5 . —Everyone in the world should play ________ role in saving ________ earth.   
—I agree with you. It is our home.

A．a; the

B．a; an

C．the; a

6 . — Do you know anything about _______ Earth?
— Yes. It provides water and foods _______ us.

A．a; for

B．an; with

C．the; for

D．/; with

7 . Don't read in ______ sun, don’t read in______ bed, either. It's bad for your eyes.

A．a, the

B．an, the

C．the, the

D．the,/

8 . — What do you think of ________ virus COVID-19?
— It is very terrible. I’ve never met   ________ much more serious disease.

A．the;a

B．a;a

C．a;the

D．the; the

9 . —Are you reading ________ article，Peter?
—Yes.It tells us how to save ________ earth.

A．an，an

B．an，the

C．the，an

D．a，the

10 . More and more people have realized saving ________ earth begins with small daily things.

A．a

B．an

C．the

D．/