7. Have you seen ______ pen? I left it here this morning.

Is it ____ black one? I think I saw it somewhere.

A. a, the B. the, the C. the, a D. a, a

8. She is _____ newcomer to ____ chemistry but she has already made some important discoveries.

A. the, the B. the, 不填 C. a, 不填 D. a, the

9. Many people agree that ___ knowledge of English is a must in ____ international trade today.

A. a, 不填 B. the, an C. the, the D. 不填，the

10. ______ usually go to church every Sunday.

A. The Brown B. A Brown C. Browns D. The Browns

11. The train is running fifty miles ______.

A. an hour B. one hour C. the hour D. a hour

12. ___ earth we live on is bigger than___ moon.

A. The, a B. The, the C. An, a D. An, the

13. — What’s the matter with you ?

—I caught ___ bad cold and had to stay in ___bed.

A. a, / B. a, the C. a, a D. the, the

14. —Do you know ___ lady in blue?

—Yes. She is a teacher of a university.

A. the B. a C. an D. /

15. —Where’s ___ nearest supermarket?

—It’s over there, just around the corner.

A. a B. an C. the D. /