The fact has worried many scientists ______the Earth is becoming warmer and warmer these years.

They _______ each other in that they are both bareheaded with sunglasses.

I heard you would go to Dalian for your holiday—I , but I have some important business to deal with.

.– I like your house very much.— Thank you, but this house is ________

It is said that living ________ nature may help people live longer.