they spent as many hours as they could _______ their lessonA.to study B.studying C.studied D.study 选什么的,为什么?说是表示目的，感觉也有道理，可是觉得B也可以，搞不清楚了……
问题描述：
they spent as many hours as they could _______ their lesson
A.to study B.studying C.studied D.study
选什么的,为什么?
说是表示目的，感觉也有道理，可是觉得B也可以，搞不清楚了……
答
选b，答案有错
答
obviously choose b
答
选B
spend 后加动名词
答
B
spent something doing something