My sister was very afraid all the way because it was the first time she ______ a car.

_______ do you help the old man with the housework?-Once a week. [ ]

We can go to a _______ to mail things.

Smoking is not allowed in our school, so it may be a good chance for our math teacher to_______ smoking.

As students, we ________ study hard to make our country more beautiful and stronger.