He seems________.
A.happily B.happy
C.happiness D.to happy
I think there will be _____ people and ______pollution.
A.less, fewer B.less, more C.fewer, less D.fewer, fewer
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
