The number of giant panda is        because people always hunt them.
#61013
A
fewer and fewer
B
smaller and smaller
C
bigger and bigger
D
more and more
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If there are ____trees, the air in our city will be ____cleaner.
#61157
A
fewer, much
B
more, more
C
more, much
D
much, more
—What a nice watch it is!  —Yes. It’s _________ one of all. 
#60979
A
expensive
B
more expensive
C
the most expensive
D
much more expensive