In freezing weather, snow can turn into ice, which is easy to ________.
| A．be slipped | B．slip |
| C．slip on | D．be slipping |
Read the passage a second time, ___________ the meaning won’t become clearer to you.
| A．and | B．so | C．or | D．but |
When she finished her story, none of us said anything about it, which made her feel rather ________.
| A．embarrassing | B．embarrassed | C．embarrass | D．embarrassment |
E-mail, as well as phone calls, _____________ an important part in daily communication.
| A．are playing | B．is playing | C．have played | D．has played |
If we don’t take steps, some rare animals, such as the Tibetan antelopes and pandas will ____________ some day just as dinosaur.
| A．die out | B．die away | C．die down | D．die off |
------- How can we __________ to a changeable environment?
-------- By constant study and changing our ideas.
| A．adopt | B．adapt | C．add | D．admit |