_______ entering the classroom, remember to take your seat and turn off your cell phone.
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A
At
B
From
C
Upon
D
As
推荐题目
. For miles around us there was nothing but a desert, without a single plant or tree ______.
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A
in the distance
B
at a distance
C
in sight
D
out of sight
The park was named Bing Hong Park ____________ a famous painter Huang Binghong.
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A
in celebration of
B
in place of
C
in hope of
D
in memory of
The reason being late for the meeting was his little son fell in this morning.
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A
for; that
B
why; that
C
for; because
D
why; because
The police tried ________________ to break up the protest crowds.
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A
in a vain
B
in vain
C
in the vain
D
for vain