Thanks _____ your ruler. [ ]

How long does it ________you to go to school by bus every day?—–Ten minutes.

Do you know _______ man in jeans?—Yes. He’s a professor of _______ university.

Rather than ____his car on the busy road, Mr. Green always prefers____ his bike.

Green is the color of _______ nature. And you can enjoy the colorful rainbow in _______ sky after the rain.