Plants _________carbon dioxide and at the same time _________oxygen. So we may put some in our bedrooms to purify the air.
Books are the most important records we keep________man’s thoughts, ideas and feelings.
________ I had worked for ten hours, I was tired out.
I think it’s unfair to judge a person________their clothes.
One of the men present held the opinion ________ the book said was wrong.
Mr Smith sold his house on the sea________2,000,000 dollars.