(天津市河东区201 4年高三二模考试)12. Jim wanted to keep fit, so he spent as much time as he_______ exercise.
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A
could taking
B
took
C
to take
D
could take
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Though I’ve tried very hard to improve my English, by no means ___________with my progress. 
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A
the teacher is not satisfied
B
is the teacher not satisfied  
C
the teacher is satisfied
D
is the teacher satisfied
________ your composition carefully, some spelling mistakes can be avoided.
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A
Having checked
B
Checking
C
If you check
D
To check