Environment(环境) is very________，but you don’t understand the_______ of it，you always drop litter everywhere．
A．important，important
B．important，importance
C．importance，importance
D．importance，important
He spent as much money as he could _______ a new iphone6.
A. buying B. buy C. to buy D. bought
The teacher told me _________when I left the classroom.
A. lock the door B. to lock the door
C. to knock at the door D. knock at the door
There ______ a large number of students in our school. The number of the students _______ over three thousand.
A. is, is B. are, are
C. is, are D. are, is
There is a test tomorrow. So Tom is busy _______ for it.
A. prepare B. ready
C. preparing D. get ready
The wetland can ________ food and shelter ______ plants and animals, including different kinds of birds.
A. provide…for B. provide…with
C. make…for D. provides…for
