---English has a large vocabulary, hasn’t it?---Yes. _____  more words and expressions and you will find it easier to read and communicate.
#91223
A
Know
B
Knowing
C
To know
D
Known
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We should think of ways to stop the waste from the factory _____ our living environment. 
#97826
A
being polluted
B
polluting
C
from being polluted
D
Polluted
Knowing how to give first aid really ______ in case of emergency. It can save lives. 
#96925
A
makes difference
B
has a difference
C
makes a difference
D
makes the difference