Can you come to my party on Sunday —-________.

___ the class done most of thework— Yes, but the rest ___________ ratherdifficult

I am lucky ______ the thing I enjoy doing most is ______ I’ve ended up doing

_______ is part of children’s nature. They always insist on getting to the bottom of everything.

下列句子中加点的词，意义相同的一项是（ ）