-- When do you need to pay the balance?
-- ______ December 31.
| A．In | B．By | C．During | D．Within |
A balloon as it is filled with air.
| A．is increased | B．increases | C．expands | D．is expanded |
-- We don’t think we’ll be able to go mountain-climbing tomorrow.
—______ the weather turns out fine?
| A．How come | B．How about | C．What if | D．Why not |
Cheer up, Maria! You can also enjoy _____ you have been dreaming of, if you don’t lose heart.
| A．as a convenient life as | B．as convenient a life as |
| C．as a life convenient as | D．convenient as a life as |
The medicine won’t cure the disease -- it ________stops the pain.
| A．likely | B．merely | C．abruptly | D．apparently |
The people who objected to cloning human beings went on strike and _________ the traffic.
| A．cut through | B．faded out | C．held on | D．held up |