The best way to prevent the air polluting _____ , but the sky is still not clear.
_______ Tom, we wouldn’t have been late for the last bus.
The twin brothers stand under the tree, ______ and say nothing.
. ________ that I was puzzled.
The factory, including its machines and buildings, ______ burnt to ashes during the fire.
– Are you cleaning my room?– I can’t help _____. I can’t bear seeing people’s room in a mess!