____ is known to all, persistence is a kind of quality and that’s ____ it takes to do anything well.
| A．As; which | B．It; which | C．It; what | D．As; what |
.Everyone in the building can hear Tom’s words:“Mother, the window _____.please come to help me.”
| A．can’t be shut | B．will be shut | C．doesn’t be shut | D．won’t be shut |
I can't advise you what to do. You must use your own _____.
| A．opinion | B．guesswork | C．justice | D．judgment |
-----Did you remember to pay the telephone bill?
------The telephone bill? ______.
| A．That isn’t due yet. | B．Are you sure | C．My telephone is out of order | D．Please remember the amount |
There is a 20 minute parking _____ here, so we must get back to the car very quickly.
| A．freedom | B．limit | C．allowance | D．prohibition |
Radium salts, which have been found to _____ in bones, give rise to cancers of the bone.
| A．pile up | B．build up | C．keep up | D．pull up |