It's surprising that your brother ________Russian so quickly—he hasn't lived there very long.
A. picked up B. looked up
C. put up D. made up
—Thank God you're safe!
—I stepped back,just ________to avoid the racing car.
A. in time B. in case
C. in need D. in vain
In order to find the missing child,villagers ________all they can over the past five hours.
A. did B. do
C. had done D. have been doing
—Alvin,are you coming with us?
—I'd love to,but something unexpected ________.
A. has come up B. was coming up
C. had come up D. would come up
—Look!Somebody ________the sofa.
—Well,it wasn't me.I didn't do it.
A. is cleaning B. was cleaning
C. has cleaned D. had cleaned
—I remember you were a talented pianist at college.Can you play the piano for me?
—Sorry,I ________the piano for years.
A. don't play B. wasn't playing
C. haven't played D. hadn't played