隋朝末年,家住涿郡的一位商人要沿着新开通的大运河乘船去洛阳,他必须经过[ ]
A.永济渠
B.江南河
C.邗沟
D.通济渠
答案:A
Mrs. Jenny gave us _________ on how to learn English well.[ ]
A. some advices
B. many advices
C. some advice
D. an advice
生产力发展水平制约着教育结构的变化。