It may take _________ years to make such robots .
A.hundred of B.two hundreds C.hundreds of D.hundred
The words on the blackboard are very important. Please __________ in your notebooks.
A.write down it B.write it down
C.write down them D.write them down
I want to be a scientist like Tu Youyou when I __________ in the future.
A.grow up B.wake up C.stay up D.turn up
—How are you going to spend your free time?
—Why not ______ a hobby, like collecting cards?
A. turn up B. put up C. make up D. take up
There _______ an exam tomorrow.
A. is going to B. is going to be
C. is going to have D. is going
I can't tell you what she said. I've promised ________ it a secret.
A.keep B.to keep C.keeping D.kept
