Question

【题目】I often spend half an hour ______ in the morning.

A.exerciseB.exercisesC.exercisingD.to exercise

Answer 1

【答案】C

【解析】

句意：我通常在早晨花半小时间运动。

根据spend time doing sth花时间做某事，固定搭配；exercise动词原形，exercises单数形式，exercising动名词，to exercise不定式；故选C。