1 . Mom, ________ moon is nice tonight. Let’s stay outside and enjoy it.

A．a

B．an

C．the

D．/

2 . ________ moon is smaller than ________ earth.

A．A; a

B．The; a

C．The; the

D．A; the

3 . ________ moon is very bright at night.

A．A

B．An

C．The

4 . —Will it rain this afternoon?
—I don’t think so. Look at _________ sun.

A．a

B．an

C．the

D．/

5 . Perhaps there will be no water or air on _________ Earth.

A．a

B．an

C．the

D．/

6 . The Grand Canyon is ________ great wonder of ________ natural world.

A．an; the

B．the; a

C．the; 不填

D．a; the

7 . —Please look at ________ moon in the sky, Lily.
—Wow! It looks like ________ round plate (盘子).

A．a; the

B．the; the

C．the; a

D．a; a

8 . — Look! What’s that moving high up in ________ sky?
— It must be ________ plane.

A．a；the

B．the；/

C．the；a

D．/；a

9 . Scientists are trying to get more energy from _________ sun.

A．a

B．an

C．the

D．/

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

A．a

B．an

C．the

D．/