作为标准件生产且带长为标准值的是（）
A．V带
B．平皮带
C．圆皮带
D．A+B
参考答案：A
If you don't know how to say something in English, you say: _______ [ ]
A. I don't understand
B. I'll start now
C. Excuse me. How do you say that in English?
D. I don't know
一 Can't you stay a little longer? I really want to talk more with you.
— Me, too. _____ I have to get home before 10 at night. [ ]
A. But
B. Since
C. And
D. For
