问题描述：
They have invented a new (type) of washing machine.
They have invented a new () of washing machine.
选项:
a、a. type
b、 b. indicate
c、 c. original
d、 d. proceed
They have invented a new () of washing machine.
选项:
a、a. type
b、 b. indicate
c、 c. original
d、 d. proceed
问题解答：
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