1 . We each took a cup of ________ tea after having ________ wonderful supper at my aunt's yesterday.

A．a；/	B．/；/
C．the；the	D．/；a

2 . It's not easy for Tom to find a job, who has been in                  prison for many years. So he is still out of                  work.

A．不填; a	B．the; a
C．不填; 不填	D．the; 不填

3 . When you visit a museum you must ask for _______ permission before taking _______ photographs inside it.

A．/; /	B．a; the
C．a; /	D．the; the

4 . It is 　　　　great honor for a country to host the Olympic Games. A great celebration was held in 　　　　honor of the event.

A．a; a	B．a; /
C．/; /	D．/; the

5 . As we all know, ____________ cloning is the creation of cells or the whole animals using DNA from ____________ single “parent”.

A．the; a	B．a; a
C．/; a	D．/; the

6 . Hunger is _____ number one global health risk, so the WFP has organized a lot of programmes, which helps people most at ________risk.

A．the； /	B．a； /
C．the；the	D．a；a

7 . While he was investigating ways to improve the telescope, Newton made ________ discovery which completely changed _________ man’s understanding of color.

A．the；a	B．a；the
C．a；不填	D．不填；the

8 . Eric didn’t feel at ____ease in the party, because he was afraid of losing ____face.

A．the; a	B．an; /
C．/; the	D．/; /

9 . This is      challenging job I mentioned to you the other day． Have you had anyone in       mind for it now?

A．a, the	B．the;/
C．the, the	D．a:/

10 . I don't think the experiment is ___ failure, because it has provided us with ___valuable experience for our future tests．

A．不填; 不填	B．不填; a
C．a; a	D．a; 不填