1.Hemadeloudnoises-------inordertodrawherattention.此处用forthepurposeof还是onpurpose2.Ihate-----whenpeopletalkwiththeirmouthfull.此处用it还是that,

Question

1.He made loud noises ------- in order to draw her attention.
此处用for the purpose of 还是on purpose
2.I hate ----- when people talk with their mouth full.
此处用it还是that,

Answer 1

1. on purpose
是故意的意思；in order to就是为了……目的的意思,不需要再用for the purpose of.
2. it
it是形式宾语,指代when以及它后面所有的内容.
补充回答：
that不能用作形式宾语.