大家看下我的英语题目做的对不对

1) Complete with a possessive adjective or pronoun
a) Joan and Bob love(their)grandparents。要用their不能用theirs
所有类似用法：
This is their pen = This is theirs。
This is our pen = This is ours。
This is my pen = This is mine。
This is her pen = This is hers。
This is his pen = This is his。（his结尾已经是s,就不变形了）
b) (ours) is the largest house in the neighborhood 对的
c) Is the CD(hir)?(他的） No,it's(her)这里要用his和hers。理由同a)。
2） Choose the correct answer 我直接写我认为的答案 大家看下对不对
a) Both Mike and(I) are expecting some mail。Are those letters for(me) or (her)
因为Mike是个男名,所以要用him而不是her。英文中比较习惯先说别人再说自己,所以后两个空先说him再说me。
b) After class,Mrs。Brown invited Paul and(me)to see the rehearsal of the play。(we)enjoyed(it)very
对的。
c) They gave flowers to (we):my sister and(me) 对的。
d) Help(me)carry(their)。He has failed。第二个空应该是them。
them是they的宾语形式,和they一个意思。而their意思是他们的,不是他们。
e) Everybody has(theirs)own Likes and dislikes。
这里要用his,严谨来讲应该写his/her,不过通常省略her,只写his。因为everybody（每个人）在英语中被当作单数,不能用their。
3) Complete using a reflexive,Emphasizing or Reciprocal pronoun。
a) You must all introduce(youself)。你拼写错了,应该是yourselves。
英语中you可以指“你”也可以指“你们”,根据语境判断。这里有一个all,所以一定是“你们”,所以用yourselves。如果是“你”,那么用单数形式yourself。
b) they had an argument last week and are still not speaking to(themselves)
对的。
c) Be careful!that frying-pan is too hot。Don't burn(youself)
拼写错啦,应该是yourself。
d) the old lady sat on a bench talking to(herself) 对的。
e) the girl is fixing her car。If you don't trust me ,go out and see for(youself) 还是yourself。
f)she was trying to calm the baby I noticed she(herself)was very upset
g) Did he pack his suitcase(themeselves)
应该是“他自己”所以是himself。另外这里貌似少了个介词,应该是by himself。
h) they know(themselves) 对的。