1..we ---(us)did that hard job last week 用代词的适当形式填空.2..这男孩自己

1..we ourselves did that hard job last week 用代词的适当形式填空.
2..这男孩自己对这件事一无所知
this boy --knows-- -nothing---- -about---- -this---- --thing.------
3..我亲自做这件事情的
①--I'll do this job by myself-------------
②---I do this job in person.---------