_____entering the classroom, remember to take your seat and turn off your cell phone.
#25297
A
At
B
From
C
Upon
D
As
推荐题目
I have a letter _____ to tell the headmaster that we need a room _____.
#28961
A
to write; to live in
B
to be written; living in
C
to write; to live
D
written; to be lived in
______giving a general introduction to computer, the course also provides practical experience.
#29198
A
In exchange for
B
Except for
C
In addition to
D
Due to
When Tracy was told her son's illness could be cured, she left the hospital ．
#26152
A
in peace
B
in surprise
C
in time
D
in relief
To fully understand the writer,we must read not only between the lines,but sometimes __________ the lines.
#28442
A
within
B
beyond
C
beside
D
among