— is she like? —She's very old.[ ]
A. What
B. Who
C. It
答案：A
深圳建立特区30年，浓缩了人们太多的消费记忆。昔日的奢侈品，今天已经进入了寻常百姓家。从根本上说，这是因为[ ]
A、单位商品价值量增加
B、社会劳动生产率提高
C、供求关系发生变化
D、经济全球化深入发展
Only after Mary read her composition the second time ____ the spelling mistake.
A．did she notice
B．she noticed
C．does she notice
D．she has noticed
