______ Lucy _______ Lily may go to the movies with you, because they are not allowed to go out on school nights.
| A．Either; or | B．Neither; nor |
| C．Both; and | D．Not only; but also |
By the end of the last month, I _____________ all the CDs of Justin Bieber.
| A．collect | B．collected | C．have collected | D．had collected |
You _________lose your way if you walk alone in the mountains at night.
A. may B need C. should D. ought to
We didn’t start our discussion __________ everybody arrived.
| A．since | B．if | C．while | D．until |
Take the exam carefully, _______ you won’t get full marks.
| A．but | B．and | C．or | D．so |
We hope that with the help of the new skill, Liu Xiang can run ________than before.
| A．fast | B．faster | C．fastest | D．the fastest |