According to the air traffic rules，you should your mobile phone before boarding．
#70302
A
switch over
B
switch on
C
switch off
D
switch round
推荐题目
On seeing the movie star appeared on the stage, the audience ________ cheering.
#73686
A
burst into
B
burst on
C
burst out
D
burst in
It’s easy to _________ this camera , while putting the pieces together is quite difficult, so you must keep the directions well.
#64439
A
take over
B
take apart
C
take down
D
take up
On seeing Jay Chow appear on the stage, the audience ______ cheering.
#69012
A
burst into
B
burst out
C
burst in
D
burst on
Practice greeting your teacher and classmates in English. Remember !
#68061
A
smiling
B
to smile
C
to be smiling
D
having smiled
Effective measures should be taken to ______ the rare species _______ being over-killed by human beings.
#65609
A
keep; against
B
prevent; from
C
stop; against
D
protect; from