语言、书面、网络等是物业管理服务沟通交流的（）。
A.概念
B.形式
C.方法
D.内容
参考答案：B
In the first picture, he a little boy. [ ]
A. looks
B. like
C. looks like
D. look at
. Tracy has gone abroad for further study. It ____ be her. The girl you saw yesterday is her sister.
A．may
B．shouldn’t
C．must
D．can’t
