The air in Beijing is getting much ______ now than a few years ago.

A. clean                 B. cleaner          C. cleanest        D. the cleanest

The air in Lanzhou is getting much _____ now than a few years ago .

    A. clean  B. cleaner  C. cleanest  D. the cleanest

The air in Beijing is getting much ______ now than a few years ago.

A. clean            B. cleaner     C. cleanest         D. the cleanest

The air today is nice and clean.

1. A.
   very
2. B.
   too
3. C.
   not
4. D.
   a little

The air today is nice __________ clean.

1. A.
   and
2. B.
   but
3. C.
   or
4. D.
   so