我国计算国内生产总值（GDP）的方法有（）。
A.工厂法
B.产品法
C.生产法
D.收入法
E.支出法
参考答案：C, D, E
The traffic problems have severely affected economic development. ________, we must spare no efforts to solve them.
A．Furthermore
B．Therefore
C．Meanwhile
D．Nevertheless
It is a good habit to________, for people will always believe in you. [ ]
A. keep one's word
B. hold one's breath
C. help oneself
D. get ready
