What___the children ___(do) when their parents came home _____(ride)cars too fast is very dangerous.we should try our best____(help)them.很据括号单词填空 有必要可加助动词或情态动词.
问题描述：
What___the children ___(do) when their parents came home
_____(ride)cars too fast is very dangerous.
we should try our best____(help)them.
很据括号单词填空 有必要可加助动词或情态动词.
答
1.were doing
2. Riding
3. to help
答
1、was doing
2、riding
3、to help
望采纳,
答
were doing
riding
to help