Conversationcallsforawillingnesstoalternatetheroleofspeakerwithoflistener,anditcallsforoccasional"digestivepauses"byboth.A.thatB.oneC.onesD.which这道题为什么要选A?Theproblemisthathascausedusalotoftro

Question

Conversation calls for a willingness to alternate the role of speaker with __ of listener ,and it calls for occasional "digestive pauses "by both .
A.that B.one C.ones D.which
这道题为什么要选A?
The problem is __ that has caused us a lot of trouble.
这道题选什么,为什么?
A.one B./ C.which D.the one

Answer 1

1.that 代前文的the role.
2.A,后面的从句无主语