With the development of modern industry, there will be ___ living space for wild animals.
A. fewer and fewer B. less and less
C. more and more D. bigger and bigger
Our English teacher told us to pay attention to ________ carefully.
A. write B. writing
C. wrote D. writes
My brother tried his best ________ up. Finally, he reached the top of the mountain.
A. climbing B. to climb
C. climbs D. to climbing
You really need to be ________ with products that are bad for your health.
A. careful B. care C. carefully D. careless
We should use china cups because we can ________ them.
A. reduce B. reuse C. recycle D. break
Smoking is ________ to you.
A. harm B. harmful C. harms D. harmless
