单项选择题

Jane (had) a great (deal of) trouble (to concentrate on) her study (because of) the noise in the next room.

A. had
B. deal of
C. to concentrate on
D. because of
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单项选择题
(According to) our estimate, only one (out of) three company managers (have been) trained (in the field of) management.
A. According to
B. out of
C. have been
D. in the field of
单项选择题
The way (which) the different kinds of rock (lie) on one another (helps) to tell the story (of long ago).
A. which
B. lie
C. helps
D. of long ago
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