21．—Would you please give me a hand and take the book－case upstairs?
—______.
A. With pleasure B. That’s all right
C. My pleasure D. Don’t hurry
22．(2010·北黄卷)Shenzhou Ⅶ ______ at about 9：10 p．m. Thursday, carrying three astronauts, one of whom became the first Chinese ______ in space.
A. lifted off; walking B. lifted off; to walk
C. lifted up; to walk D. lifted up; walking
