问题
选择题
The policeman asked the child _____ cross the street _____ the traffic lights turned green. [ ]
A. not, when
B. don't, before
C. not to, until
D. not, until
答案
答案：C
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The policeman asked the child _____ cross the street _____ the traffic lights turned green. [ ]
A. not, when
B. don't, before
C. not to, until
D. not, until
答案：C