单项选择题

At that time, many readers (found) (it) difficult (believing) what Jules Verne had written in his book (to be true).

A. found
B. it
C. believing
D. to be
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He (was) (lying) (on) the couch, (enjoyed) his cigar.
A. was
B. lying
C. on
D. enjoyed
单项选择题
(Two-thirds) of (the) area (are) covered by (water).
A. Two-thirds
B. the
C. are
D. water
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