How many people are there in your family?[ ]
A. I don't know.
B. There are five.
答案:B
We could not reason out the way the robbers escaped,because we were unable to find any ________ of them.
A.chance
B.trace
C.point
D.signal
享受免交或者减交用血费用待遇的人员与无偿献血者的关系应当是()
A.朋友
B.同学
C.直系亲属
D.单位同事
E.指定人员