1.e didn't know____.
问题描述：
1.e didn't know____.
A.what's the matter B.what the matter is
C.what was the matter D.what the matter was
选什么.选的理由.为什么不选D.
2.Somebody called you just now,but I didn't know_____.
A.who were they B.who they were
C.who was it D.who it was
选什么.为什么选.B为什么不对.
答
A.what's the matter,相当于一个词组.
D.是一个人called,应该是单数.