30.About__________of the workers in that steelworks are young people.
A. third fifths
B. three fives
C. three fifths
D. three fifth
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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
34.My name is Robert, __________most of my friends call me Bob for short.
A. then
B. instead
C. however
D. but