单项选择题
（）is often the case, one third of the workers have over-fulfilled the production plan.
A．What B．This C．That D．As
单项选择题 （）in a poor family, she is used to a simple life.
单项选择题 It was simply for some special reason（）I didn't tell you the truth at that time.
单项选择题 The conference（）a full week by the time it ends.
