If H2 burn in O2, we can get _____.
Which of the following signs means “Don’t swim”
—I never drink cola. — ________. A. So do I B. So did I C. Neither do I
---Don’t drop litter in the river. ---_________. A. It doesn’t matter B. Sorry, I won’t C. I’d love to
The teacher asked the students _______. A. when was Albert Einstein born B. how many trees they had planted. C. what they will do with the computers
There will be ___________pollution and ___________ trees and flowers if we don’t try to care about the environment from now on. A. less, fewer B. less, more C. more, fewer