作业帮These three college students are real heroes because they ri
来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/11/07 18:12:32
These three college students are real heroes because they risked ______their own lives in order to save the drowning boys in the water.
A.having lost B:to lose C.losing D.of losing
是risk doing形式,为啥选a不行,不是过去发生的事吗
A.having lost B:to lose C.losing D.of losing
是risk doing形式,为啥选a不行,不是过去发生的事吗
因为如果使用完成时态,不能用risk having done,而应该用 have risked doing这样的形式.
These three college students are real heroes because they ri
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