According to our school rules, no student ____ be permitted to carry mobile phones in class.
| A．will | B．must | C．may | D．shall |
Americans usually just say“Hi”or“Hello”， _______ a more formal handshake when they
first meet you．
| A．rather than | B．more than | C．1ess than | D．other than |
The fireman couldn’t __________ what the dark thing was through the heavy smoke．
| A．work out | B．make out | C．try out | D．set out |
We are now living in _______ world where computers rule our work and daily life．So online searches have already become _______ must．
| A．a；the | B．a：a | C．the；a | D．the；／ |
What impressed me most in his report lies in the words to bring about an _________ of the conditions of the working men and women．
| A．improvement | B．advance | C．increase | D．achievement |
________ it comes to the increasing use of motor vehicles in the cities，some people think it should be limited．
| A．Because | B．Once | C．When | D．While |