Cold ______ the night air was, he slept soundly because he was so tired after working for a whole day.
| A．although | B．while | C．however | D．as |
—Our holiday cost a lot of money.
—Did it? Well ,that doesn't matter____________ you enjoyed yourselves.
| A．unless | B．in case | C．as far as | D．as long as |
We liked the oil painting better____________ we looked at it.
| A．as | B．while | C．the | D．the more |
— Show me your permit, please.
—Oh, it's not in my pocket. It
| A．might fall out | B．could fall out |
| C．should have fallen out | D．must have fallen out |
We must keep our room clean. Dirt and disease go _____ you know.
| A．from time to time | B．hand in hand |
| C．step by step | D．one after another |
I tried hard to get some information about the new technology out of his mouth, but he remained____________.
| A．quiet | B．secret | C．silent | D．calm |