21. I felt I was failure at school, for I failed maths third time.
A. ∕; the B. .∕; a C. a; .∕ D. a ;a
22. —I had a really good weekend at my uncle’s.
— .
A. Oh, that’s very nice of you B. Congratulations!
C. it’s a pleasure D. Oh, I am glad to hear that
23. It’s known to us that a(n) medical examination will help us find out health problems as early as possible.
A. natural B. regular C. ordinary D. usual
