29.__________turn green in spring.
A. Leaf
B. Leafs
C. Leave
D. Leaves
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30.About__________of the workers in that steelworks are young people.
A. third fifths
B. three fives
C. three fifths
D. three fifth
31.Is the Changjiang River__________river in the world?
A. the third longest
B. the third longer
C. the three longest
D. the three longer
32.__________wants the book may have it.
Anyone
B. Someone
C. Those
D. Whoever
33.__________do you write to your brother?
A. How soon
B. How often
C. How long
D. How fast
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