--The room is so dirty.____ we clean it?
---Of course.
| A．Will | B．Shall | C．Would | D．Do |
________ at the door before you enter my room, please.
| A．Knock | B．Knocking | C．Knocked | D．To knock |
________ with care, one tin will last for six weeks.
| A．Use | B．Using | C．Used | D．To use |
— Can I have a day off tomorrow, Mr. Johnson?
— ________. I can manage without you.
| A．Forget it. | B．I’m afraid not. | C．It depends. | D．Of course. |
—Why not have a birthday party for our mother?
—________.
| A．Good idea | B．That's all right | C．You are welcome | D．Never mind |
—Do you know the boy ________ is sitting next to Peter?
—Yes.He is Peter's friend.
| A．whom | B．who | C．which | D．/ |