Question

The policeman asked the child ________ cross the street ________ the traffic lights turned green.

A．not, when	B．not to, until
C．didn't, before	D．not to, after

Answer 1

B

試題分析：句意：警察讓這個小孩等到交通燈變綠才可以過馬路。Ask sb to do sth“讓某人做某事”，否定形式：ask sb not to do sth。Not…until“直到……時候才”，結合語境，故選B。