Orange juice __________ my favourite.[ ]
A. is
B. are
C. be
答案：A
出版物的价格分为出版单位销售价格和出版物零售价格。
The old man has two sons, __________ lives with him, so he has always felt lonely since his wife’s death.
A．both of them
B．both of whom
C．neither of them
D．neither of whom
