摘要： – Do you know why the river was polluted? -- Many different factors the serious pollution of the river. A. contributed to B. adjusted to C. were accustomed to D. were attached to
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– Do you know why the river was polluted?
-- Many different factors ___________ the serious pollution of the river.
A. contributed to B. adjusted to C. were accustomed to D. were attached to
查看习题详情和答案>>– Do you know why the river was polluted?
-- Many different factors ___________ the serious pollution of the river.
| A．contributed to | B．adjusted to | C．were accustomed to | D．were attached to |