You have to explain ____ us the reason _____ your being absent from school yesterday.
A. to; of B. to; why C. for; that D. to; for
There are two thousand students in this college, ______ are from the countryside.
A. one-third of them B. one-third of which
C. one-third of whom D. one-third in which
---How can you keep slim as a mother of two sons?
---I _______ in the gym for years.
A. have worked out B. have been working out
C. have worked on D. have been working on
In the past ten years, the ____mountain climber ____ a lot from his own adventurous _______
A. experienced; experienced; experience B. experience; experienced; experiences
C. experienced; has experienced; experiences D. experience; has experience; experience
The average temperature this year is _______ that of last year.
A. as not high as B. not as high C. not as higher as D. not as high as
I don’t suppose Tom has told you the news, _______?
A. do I B. don't I C. does he D. has he
