单选题 ______ having to pay for a phone call, a client can inquire about a company's products by using this toll-free number.
A. Yet
B. Beyond
C. Nor
D. Without

【正确答案】 D

【答案解析】高级问题这里把have变成了动名词。那么空格内填入介词是恰当的。选项中的介词有beyond和 without。beyond表示“在(地点)的那一边”；“迟于(时间)”；“超出(能力)”；without having to的意思是“没有做某事的必要”。
[高频词语] pay for 为……付钱 inquire about 调查；询问