1 . ______ earth is only a small planet in ______ Galaxy.

A．The; a

B．The; the

C．An; a

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

A．a; /

B．the; /

C．a; the

D．the; the

3 . ______ Yangtze River is ______ longest river in China.

A．The; the

B．/; the

C．/; a

D．The; a

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

A．a

B．an

C．the

D．/

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

A．a；the

B．the；/

C．the；a

D．/；a

6 . London is in the south of England and it is on ________ River Thames.

A．a

B．the

C．an

D．/

7 . ―Tomorrow is Sunday. How do you spend it?
―I want to go on________ trip to ________Great Wall.

A．a; the

B．/; the

C．the; a

D．the; /

8 . The earth is a planet in _______ universe.

A．a

B．an

C．the

D．不填

9 . Neil Armstrong is the first man________.

A．walk on the moon

B．walk on moon

C．to walk on the moon

D．to walk on moon

10 . There is no living thing on __________moon.

A．the

B．a

C．不填