19. It took us one year ________ the bridge.
A. build B. building C. to build D. to building
18. Jim is a ________ student.
A. 16 years old B. 16 year old
C. 16 - years - old D. 16 - year - old
17. There is a railroad ________ train between
Dezhou and
A. of B. for C. about D. on
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