用所给词的适当形式填空

1. It's not easy for some students ____(get) to school.

 2. Sometimes he gets up late, so he runs____ (quick) to school.

3 . Thanks for ____ (help) me so much.

4 . My uncle is sixty years old. It's his ____   (sixty) birthday today.

5 . Liu Lu ____ (cross) the river on a ropeway every day.