问题补充:
Drivers must stop when the traffic lights red.
A. turn
B. will turn
C. turned
D. were turning
答案:
(答案→)A. turn
B. will turn
C. turned
D. were turning
解析:当红绿灯变绿的时候司机必须停下来。When引导的时间状语从句的时候,用一般现在时代替一般将来时,所以选A。
时间:2021-01-11 00:40:47
Drivers must stop when the traffic lights red.
A. turn
B. will turn
C. turned
D. were turning
(答案→)A. turn
B. will turn
C. turned
D. were turning
解析:当红绿灯变绿的时候司机必须停下来。When引导的时间状语从句的时候,用一般现在时代替一般将来时,所以选A。