---I wonder why Mr Green hasn’t showed up at the meeting yet.
---I’m not sure, but he _______ in a traffic jam driving here.
| A．could be stuck | B．might stuck |
| C．might have been stuck | D．must have stuck |
The weather turned out to be very good ,_____ was more than we could expect .
| A．what | B．which | C．that | D．it |
What you should remember is that we should always keep____ in an emergency .
| A．still | B．calm | C．quiet | D．silent |
Please___ all the numbers . Those numbers_____ 10,000.
| A．add to ; add up | B．add up ; add up to | C．add ; add to | D．add up to ; adds |
The little boy got punished_____ what he had done .
| A．because | B．because of | C．since | D．as |
The room______ window is still bright is our English teacher’s office .
| A．which | B．its | C．whose | D．that |