There _____ a lot of rubbish on the floor so I asked Mary to sweep _____ up.
| A．were; it |
| B．are; them |
| C．was; it |
| D．is; them |
The fire spread through the hotel very quickly but everyone ____ get out.
| A．had to | B．would | C．could | D．was able to |
____caused the accident is still a complete mystery.
| A．What | B．That | C．How | D．Where |
Mary __ __ be in Paris, for I saw her in the town only a few minutes ago.
| A．mustn’t | B．can’t | C．shouldn’t | D．may not |
Peter __ _ come with us tonight, but he isn’t very sure yet.
| A．must | B．may | C．can | D．will |
----Are you coming to Jeff’s party﹖
---- I’m not sure. I __ __ go to the concert instead.
| A．must | B．would | C．should | D．might |