______ is very important for us students to learn English well.
I’m too tired.I must ________ a rest.
It takes me fifteen minutes ________ from my home to the bus station.
—________ is it from here to the supermarket? —About twenty minutes’ walk.
—____ can you finish this English exam? —In about one and a half hours.
—________ does it take you to walk to school? —About 20 minutes.