Is she quiet? [ ]
A. Yes, there is.
B. No, she isn't.
C. Yes, she isn't.
答案：B
国有经济是社会主义全民所有制经济，是国民经济中的主导力量。国家应保障国有经济的巩固和发展。
Choosing the right dictionary depends on you want to use it for. [ ]
A. what
B. why
C. how
D. whether
