1 . —What were you doing at 2 o'clock yesterday afternoon?
—I was playing ________ football.

A．a

B．the

C．an

D．/

2 . 单句改错
1. My son, who is a 18-year-old young man, now is a university student.
2. We may be one family and live under a same roof.
3. The production now is four times that it was ten years ago.
4. The experiment was much more easier than we had expected.
5. He had an astonishing look on his face when he heard the news.
6. It becomes the colder and colder when winter comes.
7. The old man caught the boy by his arm.
8. These documents are not accessible by the public.
9. He studied hard every day, aimed at passing the exam.
10. About 80 percent of web traffic are in English.

3 . The woman who used to be in ________ charge of a big company is in ________ charge of a nurse at present.

A．the；不填	B．the；the
C．不填；不填	D．不填；the

4 . --Why not take ________ umbrella? It is raining.
--What________ good advice!

A．a ; an

B．an ; a

C．an ; /

5 . Environmental pollution is ________ threat to ________ man.

A．∕, a

B．∕, the

C．a, /

D．a, a

6 . Because he has been out of ________ work for months, the young man now depends on his parents for ________ living.

A．不填; a

B．the; a

C．不填; 不填

D．the; 不填

7 . She was admired by all her friends because the famous university offered her ________ extra chance after ________ last week’s interview.

A．/, the

B．an, the

C．an, /

D．the , /

8 . Every morning he spends________ hour doing exercise, then he goes to________ work.

A．a ;a

B．an; /

C．a; /

D．an; the

9 . I am going to have _________ picnic on _________ Sunday.

A．the;an

B．an;the

C．a;不填

D．an;不填

10 . We must try to reach ________ agreement if we don't want to lose ________ face.

A．the; a

B．/; the

C．an; /

D．an; the