Helen___her keys in the office,so she had to wait until her husband___home.a.has left,comeb.left,had come c.had left,come d.had left,would come帮帮忙啊~~~解释一下~~~
问题描述：
Helen___her keys in the office,so she had to wait until her husband___home.a.has left,come
b.left,had come c.had left,come d.had left,would come
帮帮忙啊~~~
解释一下~~~
答
选C 第一个空从后面的had to可以看出要填一个过去完成时 所以在CD中选 然后看后面的空 肯定是填come 所以C。
答
选c
答
选C 意思是:Helen把钥匙忘在办公室了,所以她不得不等到她的丈夫回家（才能进屋）“,”引导两个并列句型,so解释了前一句的意思 她不得不等到丈夫回家,所以她忘了钥匙.而so 引导的句子的谓语是had,一般过去时.所以“,...