Several days has passed_______the air crash（空难） happened.
A.since B.after C.as
Mary didn’t know who _______ the problem she met with at that time.
| A．to talk about | B．to talk to about |
| C．will take to about | D．will to talk |
—_______ I wash the clothes now?
—No, you _______. You _______ clean the room first.
| A．Must; don’t have to; may | B．Must; needn’t to; must |
| C．Must; mustn’t; can | D．Shall; may; may |
—Mum, can I help you with the cleaning?
—Thank you, dear. But you are ______ now. You must wait till you are _______.
| A．too young; too old | B．too young; enough old |
| C．so young; enough old | D．too young; old enough |
I can’t remember when exactly the Robinsons left _______ city. I only remember it was _______ Sunday.
| A．the; a | B．a; the | C．a; a | D．the; the |
---Do you mind me opening the window ?
---______ .It’s so cold outside.
| A．Good idea. | B．Never mind. |
| C．You’d better not. | D．Yes, please. |