________ the machine begins to work, you can’t stop it _____.
#23268
A
While; soon
B
For; right away
C
Once; at once
D
Until; immediately
推荐题目
What a mess！Tom，I have told you over and over again not to leave everything .
#23373
A
in place
B
in the place
C
out of place
D
out of the place
In my opinion , the thief is likely to come , please look _____ for him .
#23929
A
up
B
after
C
out
D
down
All passengers _______, please fasten your seat belts and remain seated _______ the plane is landing.
#22186
A
on board; until
B
abroad; since
C
on the board; before
D
aboard; when
Maria _____ missed the first train so as to travel on the same one as John.
#25018
A
deliberately
B
intensively
C
decisively
D
objectively
Carl is starting college in September. ______, he’s traveling around Europe.
#24758
A
Therefore
B
Meanwhile
C
Though
D
However