Question

【题目】—I wonder ______ Mary has kept her figure after all these years.

—By working out every day.

A. where B．how C．why D．if

Answer 1

【答案】B

【解析】考查宾语从句。句子是用表示方式的介词by回答的，所以是针对方式提问，故用how，how可以对方式进行提问。句意：——我想知道玛丽在这些年是怎么保持身材的。——通过每天锻炼。故选B。