题目

题型：不详难度：来源：

A health care project can provide treatment ______ half the cost or less，______ the needs of the patient.

A．at；relied on

B．with；relying on

C．at；relying on

D．by；relies on

答案

C

解析

at cost“以成本价”；at half the cost“以半价”；rely on 后接了宾语“the needs of the patient”，而句中已有了谓语can provide，所以rely on 必须用非谓语动词的形式；treatment和 rely on之间是主动关系，应用现在分词的形式。