72. We couldn’t read the notice on the b
题型：选择题
问题：
72. We couldn’t read the notice on the board because several people were standing _______ it.
A．in front of
B．in the front of
C．at the back of
D．in back of
72. We couldn’t read the notice on the board because several people were standing _______ it.
A．in front of
B．in the front of
C．at the back of
D．in back of