[ Grammar ]
Surprisingly, all of the houses in the ancient town are kept ______ their original state.
A. for
B. from
C. in
D. to

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A. The teacher graded the exams.
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C. The teacher is grading the exams.
D. The teacher will grade the exams tomorrow.
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There are many different types of these.
A. same
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Which of the following sentence is the expression of obligation?
A. Please, be on time!
B. No parking here!
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