— ___________ that boy?
— He's my brother.[ ]
A. Who
B. Who's
C. Who are
答案：B
单个包装也称小包装，是物品送到使用者手中的最小单位。这种包装一般属于（）。
A.工业包装
B.运输包装
C.商业包装
D.内包装
We still couldn’t decide _________ with our difficulties in learning English.[ ]
A.how to do
B.how to deal
C.what to deal
D.what to solve
