______ difficult it is, he is determined to ______ the experiment.
| A．No matter how; have a go at | B．However; have a go for |
| C．Whatever ; have a go | D．No matter what; have a go at |
.All of the ski resorts are ____ from the hotel via free public transportation.
| A．available | B．accessible | C．present | D．probable |
In our class, when the bell rang and the teacher closed his book, it was a ____ for everyone to stand up.
| A．sign | B．chance | C．mark | D．signal |
.Mary felt ______from the outside world, since she lacked an Internet connection and couldn’t receive any e-mail.
| A．cut down | B．cut in | C．cut off | D．cut out |
I have been looking for Michael for a whole day. Where ______ he have gone?
| A．should | B．can | C．must | D．may |
.—You couldn’t have bought me any present better. —_______.
| A．I’m glad you like it. | B．Then I’ll give you a better one next time. |
| C．You have a gift for present | D．I’m sorry I can’t make you satisfied |