It’s difficult for us to __________ each other because we have spent so much time together .
A. separate from B. separate to
C. play with D. lay for
Smoking ______ in public places in many countries. So you ______ smoke here.
A.doesn’t allow ， can’t B. isn’t allowed， mustn’t
C.wasn’t allowed， may not D. didn’t allow， can’t
---He is an honest person ， so what he said is _______.
A， knowledgeable B， valuable
C， comfortable D， believable
______ it is raining hard ， they are still working in the field.
A. Because B. As soon as
C. Though D. Unless
The houses in big cities are so expensive that I can’t __________ to buy one .
A. afford B. choose C. decide D. Give
.A smile costs _________， but gives so much. So we should learn to smile.
A. something B. anything
. nothing D. Everything
