All of us must do_______ to help protect the environment，or we will have more hazy weather雾霾天气.
A. something usefulB. anything useful C. useful something D. useful nothing
I don’t like bread. I won’t eat it_____________ I am much too hungry.
A. ifB. whenC. becauseD. unless
________of the chemical factories in their city _________pouring waste water into the river. It’s too dangerous.
A. Two fifths; are B. Two fifths; is C. Two fifth; are D. Two fifth; is
—How much will you be paid?
—Tom, I do it not for money, but for experience. ____, it’s a kind of volunteer activity.
A. HoweverB. BesidesC. FinallyD. Possibly
It’s _______ MP5 . It can be used to listen music and watch movies . It’s ________ useful invention .
A. a ; a B. a ; an C. an ; a D. an ; an
—The dictionary is an important _______ for students .Each of us must have one .
—I think so .
A. secretB. toolC. methodD. plan
