--How do you pay the waitress? ---As a rule, they are paid ____.
| A．by hour | B．by the hour | C．by an hour | D．by hours |
.
We’ve published large quantities of books This year _______we’ve published three
million copies．
| A．only | B．just | C．alone | D．simply |
.
I’ll go to America to strengthen my English _______it isn’t too expensive.
| A．except | B．provided | C．assumed | D．unless |
.
These achievements_______ without the contribution of Qian Xuesen, a key leader of the New China's nuclear, missile and so on．
| A．would have been unthinkable | B．would not be unthinkable |
| C．would be unthinkable | D．would not have been unthinkable |
.
—How about going out for a picnic on Sunday morning?
—Hmm．___．The weather is very good these days．
| A．Yes, why not | B．Well, no way | C．Oh, never mind | D．Sure, no matter |
.
Greatly frightened by the terrible scene, _______.
| A．tears came to my eyes | B．my heart was full of fright |
| C．my body trembled | D．I couldn’t help crying out |