1 . Our teacher told us ________ earth moves around the sun.

A．an

B．the

C．/

2 . Everyone should play ________ part in saving ________ earth.

A．a; an

B．a; the

C．the; /

D．the; an

3 . I like playing ________ basketball with my friends when ________ full moon is high in the sky.

A．/; the

B．the; a

C．the; /

D．a; the

4 . China has set a goal (目标) of sending astronauts to ________ moon by 2030.

A．a

B．the

C．an

5 . —It’s ________ exciting day, isn’t it?
—Yes, it is. Well, ________ sun is going down. We have to go home.

A．a; a

B．a; the

C．an: the

D．an; a

6 . Daming is eating ________ ice cream in ________ sun.

A．an; the

B．an; /

C．a; the

D．a; a

7 . ________ earth is much bigger than ________ moon.

A．An; a

B．An; the

C．The; the

D．The; a

8 . We can’t see ________ sun at night.

A．/

B．a

C．the

9 . Scientists have found many galaxies in ________ universe.

A．a

B．an

C．the

D．/

10 . Today Mr. Liu told us something about         universe in class.

A．a	B．an
C．the	D．/