_____ in the regulations that you should not tell other people the password of your e-mail account.
A. What is required B. What requires C. It is required D. It requires
The conference has been held to discuss the effects of tourism ______ the wildlife in the area.
A. to B. on C. at D. with
I’ve already told you that I’m going to buy it, ________.
A. how much does it cost B. no matter how it costs
C. however does it cost much D. however much it costs
As high school students, it’s very important to keep ourselves ______ of what’s happening home and abroad every day.
A．to inform B．informing C．informed D．be informed
In order to protect the environment, supermarkets and stores are forbidden to ______ free plastic bags to shoppers..
A. put away B put off C. give off D. give away
Believing that everyone can make _____ world _____ better place on a daily basis, Tom plays his part in helping others.
A. /, a B. the, / C. the, a D. the, the
