Don't you smoke until the plane __ off.
问题描述：
Don't you smoke until the plane __ off.
A takes B took C has taken D had taken
答
你多写了个"you"
选C
Don't smoke until the plane has taken off.直到飞机起飞你才可以吸烟.
not …until… 直到……才……
现在完成时（have/has done sth.）强调对现在的影响.