我想问 use to和used to 和 be used to的用法

我想问 use to和used to 和 be used to的用法
1.he(is used to)(used to)work sixteen hours a day.
2.i(use to)(used to)see him often.
3.he always(uses)(used to)scented soap.
4.he(used to)(is used to)buy two bars of chocolate a day.
5.i could not stand the noise at first but i(am used to)(used to)
it now.
6.i(am used to)(used to)swimming in cold water.
这些问题哪我自己都做了 可是我不知道对还是不对,大家帮我做一下一定要最正确的.
还有一个问题是,
they hoped to find buried treasure,they hoped they______it
1.would find.2had found.3 will find.4 are going to find.
在这四个答案里我不知道哪个是对的,我大概想是第一个是对的,可是都面的一句已经有了一个hoped过去形式will还用would