34.I have a twin brother,so my teachers often mistake me ___

34.I have a twin brother,so my teachers often mistake me ___C_ my brother.
A.to B.as C.for D.with
35.We offered him our congratulations __D___ his passing the college entrance exams.
A.at B.on C.since D.for
43.The two friends were so pleased to see each other that they forgot __A___.
A.anything else B.something else C.everything else D.nothing else
44.Are Lily and Lucy friends __D___.
A.of you B.to you C.to yours D.of yours
45.There are lots of English books here,and ___A_ of them is easy to understand.
A.each B.every C.all D.both
46._B___ are very friendly to us.
A.Both they B.Both of them C.Both them D.They both
中间的字母是我自己选的答案，