我国的小组大体可分为几种类型（）
A.5种
B.7种
C.9种
D.11种
参考答案：D
淋沥汤功效与作用
It is hard to say what kind of person he is．Sometimes he is very friendly; at other times he ___ be very cold．
A．can
B．must
C．will
D．shall
