问题
选择题
He knew that cholera would never be controlled _____ its cause was found.
A．till
B．still
C．until
D．kill
答案
答案：C
考查：not/never …until,直到……才， 句意：他知道霍乱将永远不会被控制，直到它的起因被找到。故选C。
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He knew that cholera would never be controlled _____ its cause was found.
A．till
B．still
C．until
D．kill
答案：C
考查：not/never …until,直到……才， 句意：他知道霍乱将永远不会被控制，直到它的起因被找到。故选C。