To make contributions to the protection of the environment, the company encourages its workforce to make the _______ to alternative means of transportation such as carpooling or biking to reduce air pollution.
| A．switch | B．conclusion |
| C．variety | D．enquiry |
No student ______go out of school after eleven o’clock at night without the teacher’s permission.
| A．will | B．must | C．may | D．shall |
The scientist holds the view _______ the book said was right.
| A．what that | B．that what | C．that | D．whether |
Don’t worry. I’m sure you’ll succeed _______ if you work hard.
| A．on time | B．in time | C．at times | D．ahead of time |
The police spotted a thief________ things in a mall at this time yesterday.
| A．stealing | B．steal | C．robbed | D．picking |
In most western countries, on April Fool’s Day, people often play __ ___ trick on each other; children especially have great ______ fun.
| A．a; a | B．the; the | C．/; a | D．a; / |