Question

一道英语选择题，帮解答，最好能有解释？

However, as in the case of a falling tide, Beijing has been tightening（）-to fight inflation for a year now.
A. credited B. credit C. crediting D. credible

Answer 1

可以排除法，选B
因为原文需要一个宾语，即名词，其他三个选项是动词、动名词、形容词，不合适。

Answer 2

tighten动词，后接宾语，用名词credit，其它三个都不能作tighten的宾语
tighten credit 紧缩信贷，答案是B
Apparently well aware of the problem, China's policymakers have started to tighten credit.