By the time I locked the door, I realized I ________ my keys at home.
A．had repaired B．had changed
C．had forgotten D．had left
It is cruel___ them to catch the sharks and cut______ their fins.
A.of down B.for off
C.of off D.for down
- Would you please take this workbook to the teacher's office for me?
— ________.
A.Never mind. B. With pleasure.
C. That's right. D. Don't mention it
I regret ______ to my head teacher,not listening to him.
A. talk back B. to talk back
C. talking back D.talk with
—The meeting _______ because of the fog in Northern China last week.
— Oh, it’s too bad! We should take action to improve the air quality.
A.put out B. was put out
C. put off D. was put off.
— I wonder if I can learn English well.
— _______. All things are difficult before they are easy.
A. I am afraid so B. You’re slow
C. It takes time D. It’s a piece of cake
