Look! There are some birds _______ in the sky. They are very beautiful.
A. to fly B. fly C. flying D. flown
You’d better _______ the test paper before handing it in.
A. go ahead B. go on C. go off D. go over
Nancy, sweep the classroom, _______?
A. don’t you B. do you
C. will you D. doesn’t she
The dog _______ played with you just now is _______.
A. which; mine B. which; my
C. what; mine D. what; my
Three million _______ a large number. You can make it _______.
A. are; small B. is; smaller
C. is; small D. are; smaller
Over fifty countries _______ the AIIB(亚投行) so far.
A. joined B. was joining
C. had joined D. have joined
