Ⅱ. Appliance of Language points（45 points）
Section A （15 points）
Directions: Beneath each of the following sentences there are four choices marked A, B, C and D. Choose the answer that best completes the sentence.
21. ( ) 21. The first meeting of________G-20 nations in April came at the height of the global financial crisis — _________crisis that required unprecedented international cooperation to jumpstart the world's economies and help break the downward spiral that enveloped all our nations.
A. / ; the B. the; a C. a; the D. the; the
22. --- Be careful! Don’t forget you are on a ladder.
--- But you are holding it for me, nothing _________.
A. to worry about B worry about. C. is worried about D. worrying about
