15 CÂU HỎI
To save electricity, we are cutting down __________ our central heating.
A. on
B. up
C. for
D. of
A hydroelectric dam ______________ in this area now.
A. is building
B. is being built
C. build
D. was built
Let’s _________ water by turning off tapes when not using.
A. save
B. to save
C. saving
D. saved
Deforestation _________ destroying Earth’s plant and animal variety.
A. are
B. be
C. is
D. being
I_______ in the lounge for ten minutes.
A. was told waiting
B. was told to wait
C. was telling to be waited
D. was told to be waited
There are about 3,000 plants __________ values as medicines against cancer, AIDS, heart disease and many other sicknesses.
A. for
B. in
C. on
D. with
Man and most animals need a _____________ supply of water to live.
A. constant
B. flexible
C. polluted
D. valuable
Both fossil fuel _______ non-renewable resources are very important to our life.
A. or
B. and
C. for
D. with
__________ we conserve natural resources, they will run out very soon.
A. If
B. Unless
C. Whether
D. In case
What about ___________ the solution together this afternoon?
A. find
B. finding
C. to find
D. to finding
Without plants, most water ____________ off as soon as it falls, taking away valuable soil.
A. would run
B. will run
C. running
D. has run
Recycling is a good way of ___________ the environment.
A. protecting
B. damaging
C. destroying
D. editing
Each year about fifty hundred_________ of plants and animals are already being eliminated.
A. damages
B. floods
C. species
D. defence
The students _______to be at school at 8 am.
A. tell
B. told
C. have told
D. were told
The leopard is _________ the threat of extinction.
A. in
B. on
C. under
D. below
