-- Do you know ____________________ this afternoon?
-- I'm not sure, but I'll tell you as soon as she_____________________.
A. how will Betty arrive; starts
B. how Betty will arrive; will start
C. what time will Betty arrive; will start
D. what time Betty will arrive; starts
--Mr. Lee__________to a student when I entered the classroom this morning.
---He is very patient________ he is young.
A. talking; but B. talks; though
C. was talking; though D. talked; however
After running a 1000-metre race, he was________.
A. out of breathe B. breathed heavily
C. took a deep breath D. out of breath
The country life he was used to ____ greatly since 1992.
A. change B. has changed
C. changing D. have changed
In our school library there_______ a number of books on science, and in these years the number of them_______ growing larger and larger.
A. are; is B. is; are
C. have; are D. has; is
The rivers will become dirtier and dirtier________ we take action to protect them.
A. since B. if C. until D. unless
