While we are developing agriculture and industry, we must prevent the earth ______.
#65506
A
from polluting
B
polluted
C
polluting
D
being polluted
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His success ____ the fact ____ he had been working hard. 
#84175
A
put in; which
B
led to; because
C
lay in; that
D
got in; that
She likes to have everything in order so that she can ______ them when necessary. 
#75192
A
have a hand in
B
place hands on
C
put her hands on
D
lay her hand on