.—May I remind you that a Mr. Zhang is waiting downstairs, sir? —Oh, dear. I ________ about it.
He is afraid to face the difficulty he thinks he’ll have the driving test tomorrow; he finds it difficult rid of the worries.
After the long journey, the Smiths returned home, ____.
Not everyone has realized what_______ important part the balance of________ nature plays in their life.
It’s easier to catch a _____ lion than the one that’s awake.
Mr. Smith didn’t go to the party because he had a lot of experiments _____.