——Mom,what did your doctor say?—— He advised me to live _____ the air is fresher.in where B. in which C. the place where D. where
He didn't realize he had forgot his bag _____ the plane had taken off.
_____ of the new aircraft will start next year.
The girl had to ____the college entrance exam because of her maother’illness.
You can see the village _____a distance of 20 miles.
— I'm sorry. I lost the key to your bike. —________. I have another one.