The misunderstanding between the father and son() from the lack of communication.
A.raised
B.rose
C.arose
D.aroused

The director mentioned to us ______he was going to do this experiment once again by himself.A．whatB．whoC．thatD．which 点击查看答案

The chief engineer stated______ he believed it was necessary to study the proposals for several more months before making a decision.A．whatB．whoC．thatD．which 点击查看答案