选B,when引导是时间状语从句
选D,if引导的是条件状语从句
选B或D句子意思都没错,所以只有选A
求这道题所包含的所有语法知识
求这道题所包含的所有语法知识
——turn color and fall to the ground is a sign of winter.
A That leaves B When leaves C Leaves D If leaves
——turn color and fall to the ground is a sign of winter.
A That leaves B When leaves C Leaves D If leaves
英语人气：400 ℃时间：2020-07-16 10:03:37
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