多挑毛病，搬弄是非，造成同事之间理解信任的一大障碍的行为是（）。
A.自私
B.嫉妒
C.吝啬
D.虚伪
参考答案：B
-- Hello, this is Jack. Mary I speak to Tom?
-- Sorry, he isn't in at the moment. If he back, I'II ask him to call you back.
A．come
B．comes
C．have come
D．came
_________ obviously made no difference whether I was there to look after things or not.
A．It
B．That
C．What
D．This
