You can have your lunch at fast food restaurants.
A. Right.
B. Wrong.
C. Doesn't say.
完全可竞争市场及沉没成本是()理论的分析中心
A. SCP理论
B. 产业结构
C. 可竞争理论
D. 产业组织
【B4】
A. said
B. spoke
C. shouted
In school the pupils can't learn a foreign language well because ______.
A. they have no recorders
B. they have too much time for it
C. they are busy with other subjects