36. His brother had become a teacher, _____ he wanted to be.
A. who
B. what
C. which
D. that
37. _____ I saw was two men crossing the street.
A. What
B. Whom
C. Who
D. That
38. The time will come _____ man can fly to outer space freely.
A. that
B. when
C. in that
D. what
39. Before her marriage, she spent a considerable time in that very part of Shanghai,_____ she belonged.
A. which
B. to where
C. to which
D. at which
40. The United States is composed of fifty states, two of _____ are separated from the others by land or water.
A. them
B. that
C. which
D. those
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