Only 16 percent of China’s area ____ covered with forests, so ____of us should protect trees. 
#43863
A
are; every
B
is; each
C
is; everyone
D
are; each
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Three-fourths of the buildings ______.
#85968
A
was destroyed
B
is destroyed
C
were destroyed
D
has been destroyed
No one except Jack and Tom  _____the answer.
#86146
A
know
B
knows
C
isknowing
D
areknown