the red switch on the left and the flying machine will swiftly go up into the air and      its journey. 
#92558
A
Press, begins
B
Press, begin
C
Pressed, begins
D
To press, to begin
推荐题目
You can hardly imagine the difficulty the woman had________ her children.
#94905
A
brought up
B
to bring up
C
bringing up
D
to have brought up
It _________ there is a disaster _________ people will think much of the safety.
#93943
A
is until; when
B
is until; that
C
isn’t until; when
D
isn’t until; that
Not until all the fish died in the river      how specious the pollution was. 
#93485
A
did the villagers realize
B
that the villagers realized
C
the villagers did realize
D
didn’t the villagers realize