In much of the animal world, night is the time ______ for sleep—pure and simple.
—Excuse me,may I have a word with Mr. Zhang?—I’m afraid he’s not_______now.He’s having a class upstairs.
— The contest is drawing near, and I feel very nervous.— ______. So long as you try your best, it doesn’t matter whether you win or not.
Don’t try to persuade my parents;they won’t have the of forgiving me.
He formed a good habit from his childhood, ________ a lot of useful knowledge.
When the students heard the alarm, they all hurried to they thought was an emergency exit door.