1～9这九个数各出现一次，你能填出□里的数字吗？
4×1963=7852
What is _________ way of going to school in your country?
A．the most popular
B．most popular
C．more popular
D．popular
多项式a2-a+5减去3a2-4，结果是[ ]
A.-2a2-a+9
B.-2a2-a+1
C.2a2-a+9
D.-2a2+a+9
