You have to study hard to keep pace in your classmates
A.have to
B.hard
C.keep pace in
D.classmates

The problem of the use of our natural resources may be divided into …............ .
A.two parts
B.three parts
C.four parts



two parts
D.five parts

The relations between trees, soil and water …............. .
A.Water is a great destroyer of soil and trees are its great protectors
B.Trees need both soil and water to grow, and water needs to be kept by soil and trees
C.A & B are incorrect
D.A & B are correct

When minerals are used up, ….. ..........
A.they can be restored
B.they are gone forever
C.they can be found soon
D.they can be supplied again

Do you think healthcare facilities such as hospitals needs to be improved?
A.healthcare
B.hospitals
C.needs
D.improved

To help with medical researches, animals are used in place of human beings in experiments.
A.researches
B.are used
C.human beings
D.experiments.

A.student



stupid
B.stupid
C.study
D.studio

A.needed
B.picked
C.liked
D.jumped

A.include
B.hut
C.rude
D.June

This stamp (collect)…………is valuable.
A.collection
B.collected
C.collecting
D.collects