下列术语中属于到达合同的是( )。
A．CIF
B．FOB
C．EXW
D．DES
参考答案：D
93是31的公倍数。[ ]
单项选择。
— What's your sister doing?
— She is singing a song _______ my mother. [ ]
A. at
B. to
C. on
D. in
