We stayed there and watched the opera ______ an hour.
#39983
A
in
B
for
C
at
D
on
推荐题目
The girl saves money  ____________ help the poor in need of food .
#40775
A
so that
B
in order that
C
in order to
D
in order
Mr. Wang is in the office alone.
#43737
A
lonely
B
quietly
C
with somebody
D
without anybody