题目内容
（请给出正确答案）
A. Have, been
B. Have, gone
C. Have, been to
D. Have, gone to
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更多“ ______ you _______ there befo…”相关的问题
A．You hear the gun before you see the smoke.
B．You see the smoke before you hear the gun.
C．The sound of the gun will reach you before the race starts.
D．Racers start to run before you see the smoke.
A、Never think before you speak.
B、Speak before you think.
C、Allow the words come out naturally.
D、Never think about what you are going to say.
You can't prescribe before you ______ as a doctor.
A．fit
B．qualify
C．match
D．equal
You will get the message ______.
A、not long after
B、not long
C、before long
D、long before
—Are you sure ______ you've met him before？
A．unless
B．that
C．when
D．though
You might consider ______ work before you decide what you want to do.
A．lifelong
B．present
C．permanent
D．temporary
You'd better ______ your computer before you use it again.
A．observe
B．begin
C．check
D．pick
______ at the door before you come into the room.
A．Hit
B．Knock
C．Touch
D．Strike
You are required to wear _______ clothing before you enter the room.
A．protect
B．protective
C．protection
D．protecting
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