My little cat sleeps ______ the day, but ______ night he begins to work.
#49584
A
at; at
B
on; in
C
on; at
D
during; at
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They will build nature reserves _____ protecting ______ birds.
#46946
A
to; in danger
B
for; endangered
C
to; endangered
D
for; in danger
Dung is kind and helpful, but he is also a little careless _____________.
#47410
A
at time
B
at a time
C
at times
D
once a time