_____ into use in April 2000, the hotline was meant for residents reporting water and
heating supply breakdowns.
| A．Put | B．Putting | C．Having put | D．Being put |
--- Isn’t that Jessica’s brother over there?
--- No, it _______ be him. I’m sure he doesn’t wear glasses.
A. can’t B. must not C won’t D may not
She was fired by the boss because she failed to ___________ for work on Monday.
A. turn up B. turn down C. turn on D turn out
Great changes _________ in China in the last two decades.
| A．have taken place | B．took place |
| C．have been taken place | D．are taking place |
We must set a limit __________ the expense of the trip.
| A．to | B．on | C．for | D．with |
He’s thinned down a lot since he ___________ a diet.
| A．got on | B．put on | C．kept on | D．went on |