These two kinds of ways are totally different in nature, and we should not _______ the two.
It was about 600 years ago __________ the first clock was made.
He is wearing sunglasses to __________ his eyes from the strong sunlight.
The policemen are searching _____ every house _____ the thief.
. The book, _______ is blue, is mine.
Paul didn’t want to put on the coat. He said that he _________ by his friends.