—Hi, why are you here?
—I ________ for Susan for 15 minutes.
A. have been waiting
B. have waiting
C. am waiting
D am been waiting
He ________ how to control the machine. So he asked Tom for help.
A. knew much B. had no idea C. had fun
Last Sunday, I got A+ in the math exam. My mother ________ what I did.
A. was angry with
B. was happy with
C. was interested in
Tom caught the thief by himself. He is so ________ that all of us are proud of him.
A. funny B. beautiful C. Brave
The about something is all about its facts.
A. discovery B. appearance C. truth
It is improtant to clear all your own things from the classroom when the school year ends.
A. personal B. possessions C. passport