It is required that students _____mobile phones at school, so seldom _____them using one.
A. don’t use; will you see B. should not use; you will see
C. not use; will you see D. can’t use; will you see
——Tom is never late for work. Why is he absent today?
—— Something _____to him.
A. must have happened B. can have happened
C. must happen D. can happen
—— Could you tell me his telephone number?
—— _____the phone book and find it out yourself.
A. Look up B. Search for C. Refer to D. Go through
Don’t all stand up together! ________, please.
A. Each at one time B. One at a time C. One by one time D. One for each time
______from space, the earth, with water _____seventy percent of its surface looks like a blue ball.
A. Seen; covered B. Seen; covering C. Seeing; covered D. Seeing; covering
Roads in this mountain area used to be ______; people found it hard to travel here.
A. in poor conditions B. in good condition
C. in poor condition D. in a poor condition
