Question

--_______ will the meeting last?
--_______ they reach an agreement.

A．How long; Not until	B．When; Not until
C．How long; Until	D．When; Until

Answer 1

C

试题分析：句意：会议要开多久？直到他们达成协议。对一段时间的提问常用疑问词how long；until直到；not…until直到……才，但通常不用not until，所以选C。