几道英语根据所给汉语完成句子的题目(初二哒~)…………

问题描述:

几道英语根据所给汉语完成句子的题目(初二哒~)…………
Terrorists _________(引起了) many tragedies.
Our English class often _________(结束) up with a song.
Before you _________(跨过) the street,you must look both ways.

1.caused,过去时 2.ends,一般现在时 3.cross,一般现在时