It never will rain roses. __________ we want to have more roses. we must plant trees.
| A．When | B．Unless |
| C．Until | D．While |
It is _______ it was yesterday.
| A．as beautiful day as | B．as a beautiful day as |
| C．as beautiful a day as | D．beautiful as a day as |
He is quick to ____ himself to new environment.
| A．adopt | B．adore | C．adapt | D．adept |
You can go out, _________you promise to be back before 11 o'clock.
| A．as far as | B．so far as | C．when | D．so long as |
---I will not come here tomorrow.
--- _____________to me, because I don’t care.
| A．It doesn’t make any difference | B．It makes much difference |
| C．It doesn’t make no difference | D．It makes a difference |
16．Please tell me how the accident_____. I am still in the dark.
| A．came by | B．came out | C．came to | D．came about |