按要求改写下列句子

1、My little cousin often eats junk food.(改为一般疑问句)
Does your little cousin _ often eat__ ___ junk food?
2、The baby sleeps ten hours every night.(对划线部分提问：ten hours）
__How much time_ ___ ___ does the baby sleep every night?
3、Susan writes to her mother twice a month.(对划线部分提问：twice a month)
___How often ___ does Susan write to her mother?
4、Bill usually watches TV on Saturday evenings.(对划线部分提问：watches TV)
_When__ does Bill usually _watch__ on Saturday evenings?
5、Li Ming often helps me with my Chinese.(改为同义句）
Li Ming often helps me __to practice_ ___ Chinese.

1 often eat
2 How many hours
3 How often
4 what do
5 to study