—How can we protect ourselves ________ the earthquake?  —We should stay calm first.
#35891
A
with
B
about
C
for
D
from
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He hadn’t worked hard at his lessons._______, he failed in the exam.
#40529
A
As a result
B
However
C
Otherwise
D
Since then
We’ll make laws______ our environment.
#35656
A
protected
B
protecting
C
to protect
D
protect