合并成主从复合句.She runs fad.her sister runs vevy fast
问题描述：
合并成主从复合句.She runs fad.her sister runs vevy fast
答
She runs fast while her sister runs very fast.She runs fast but her sister runs very fast.这两句话似乎很难搞成主从复合句.上两句是并列句.可用定语从句试一下.She runs fast,whose sister runs very fast.(似...