Many trees ____ along the streets every year. So the air is very fresh now.
A. plant B.are planted
C.planted D.were planted
–Why didn’t you go to see the Breakup Buddies(《心花路放》) with us yesterday?
--Because I _____ twice.
A. have seen B.will see
C.am seeing D.see
Bill Grates is one of ______ people in the world.
A. the richer B.richest
C.richer D.the richest
Susan is so worried because she ______ her ticket, then she can’t go to England on time.
A. lose B.lost
C.losing D.will lose
______ on the light, Tony. It is too dark in the room.
A.Turning B.To turn
C.Don’t turn D.Turn
He kept writing the book _____ he was in great pain.
A.because B.if
C.unless D.even though