Mr. Smith came to our school in 2003. He _____ here for 10 years.

.Hardly_______when the fans began to scream with excitement.

We must try our best to stop pollution ______ a low-carbon(低碳)life.

My grandpa transplants some trees to his garden ________ it is the best time for them every year.

Don’t cut in line when you the bus at the bus stop.