The days are gone ________ we could leave our door unlocked at night.A．whereB．wh_刷题宝

题干

The days are gone ________ we could leave our door unlocked at night.

A．where

B．which

C．when

D．while

上一题下一题 0.85难度单项选择更新时间:2017-02-07 04:26:15

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