用适当的引导词填空。

1. Have you been back to the place _____ your ancestors lived?

2. He has found _____ his family is like a tall tree with long roots.

3. Robert is just one young overseas Chinese _____ has come to visit his ancestors' homeland.

4. The students feel _____ they are part of the village.

5. I'm beginning to understand my Chinese roots and _____ I am.

可能形成代偿性支气管动脉侧支循环的先天性心脏病是法洛四联症。()