问题
选择题
17. One of the mottos for the park makes_____clear that science and business can and must work together to build the future.
A．them
B．it
C．us
D．This
答案
答案：B
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17. One of the mottos for the park makes_____clear that science and business can and must work together to build the future.
A．them
B．it
C．us
D．This
答案：B