— What’s up?
— There are so many problems ______.
| A．remained to be solved | B．remaining to solve |
| C．remained solving | D．remaining to be solved |
Helen ______ go on the trip with us, but she isn’t quite sure yet.
| A．shall | B．must | C．may | D．can |
The World Wide Web is sometimes jokingly called the World Wide Wait because it ______ be very slow.
| A．should | B．must | C．will | D．can |
— Tom is never late for work. Why is he absent today ?
— Something _______ to him.
| A．must happen | B．should have happened |
| C．could have happened | D．must have happened |
But for the help you gave me, I _______ the examinations.
| A．would have passed | B．would pass |
| C．wouldn’t have passed | D．wouldn’t pass |
When a pencil is partly in a glass of water, it looks as if it ______.
| A．breaks | B．has broken |
| C．were broken | D．had been broken |