The producer comes regularly to collect the cameras _______ to our shop for quality problems.
| A．returning | B．returned | C．to return | D．to be returned |
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 |
— Shall I give you a ride as you live so far away ?
— Thank you. _______.
| A．It couldn’t be better | B．Of course you can |
| C．If you like | D．It’s up to you |
If I ________ plan to do anything I wanted to. I’d like to go to Tibet and travel through as much of it as possible.
| A．would | B．could | C．had to | D．ought to |