— It’s convenient to travel from Ezhou to Wuhan by taking the newly-built green railway.— Yes. It’s said that ________________ is enough.

Ms.liu often goes to school_____ a car.

Here is the book. First ______it and then tell me what you think of it.

Nowadays scientists are working hard to find out ______ to do with air pollution.

 -______does it take you to get to the zoo?-.It takes me ________hour.