1.the elephant is an interesting animal.I'm (感兴趣）in it.

1.the elephant is an interesting animal.I'm (感兴趣）in it.
2.No one knows the (原因）why he was late today and yesterday.
3.He sometimes (buy)some snacks from the shop.
4.It's one of the (f )holidays for children in the USA.
5.He or she would get a trick like (h )a stone in his or her bags instead of some candies.
6.Be careful.There are some holes( ) the road.
A.on B.at C.in D.of
填什么?为什么?
一楼的全错！