单项选择题
A.You have B.They have C.It is D.There is
The population of the earth（）increasing fast.A.isB.areC...
单项选择题The population of the earth（）increasing fast.
A.is B.are C.were D.have been
The plane was about to（）, and yet I left my ticket behi...
单项选择题The plane was about to（）, and yet I left my ticket behind.
A.take off B.take onC.take up D.take in
The people in this city have planted（）trees along both ...
单项选择题The people in this city have planted（）trees along both sides of the streets.
A.a great deal of B.much C.a large amount of D.a lot of
