How much do you need that bike?A. to pay forB. to payC. pay forD. buy

问题补充：

How much do you need that bike?

A. to pay for

B. to pay

C. pay for

D. buy

答案：

(答案→)A. to pay for

B. to pay

C. pay for

D. buy

解析：pay的基本用法是：(1) pay (sb. ) money for sth. 付钱（给某人）买……。 (2)pay for sth. 付……的钱。 (3)pay for sb. 替某人付钱。(4)pay sb. 付钱给某人。Buy的含义是买。句意：那辆自行车你需要付多少钱？本句中need是行为动词，需要的含义。后面接不定式作宾语，故选A。