This is the mountain ______ the top is always covered with snow.
| A．of what |
| B．of which |
| C．whose |
| D．that |
---I went to see my friends off at the airport.
---Is that_____you were late for the important meeting?
| A．because | B．why | C．how | D．reason |
Mary is crazy _______ playing the piano.
| A．at | B．in | C．about | D．of |
It is______ these stories can amuse her.
| A．sure | B．surely | C．certain | D．eager |
would you please_____this form for me to see if I’ve filled it right?
| A．take off | B．look after | C．give up | D．go over |
----Are you cold?
----No, __________.
| A．at least | B．at most | C．never | D．at in the least |