企业角度评价技术主要考虑（）。
A.技术的先进性、可行性、连续性
B.经济效果
C.社会效果
D.风险性及风险与收益的关系
参考答案：A, B, C, D
He has written many books, but _______ of them are good.
A．few B．many C．any
—Sam's birthday is coming. What should I get him?
—What about a ______? He loves reading. [ ]
A. football
B. cake
C. book
D. picture
