请说明原因The light in the room__before you leaveA must turn off B wil_英语解答

请说明原因
The light in the room__before you leave
A must turn off B will turn off C are turned off D must be turned off

人气：103 ℃　时间：2020-10-01 19:41:41

解答

这个题目选D
主句的主语是物不是人,此题应选用被动语态,所以就不能用主动语态的形式A或B,而原句中的主语the light 为单数,又排除C项,故选择D