根据句意或首字母填写，每空一词。

1.  I ride my bike to the subway s_______, then I take the subway.

2.  In China,  bikes are the most p_______ means of transportation.

3.  In my school, only a small n_______ of students take the subway to school.

4.  I need to see my friend,  Carrie.  She is ill in the h_______.

5.  Her son has a bad cough and it w_______her.