【答案】

【1】I don’t think the pollution here is as serious as we imagine

【2】Though he didn’t get on well with his classmates, it turned out that he had nothing to do with the event.

【3】This 17-hole bridge only takes up three quarters of the area.

【4】Japan is the second country we are going to visit in Asia.

【5】Has there been any progress in the research so far?

【解析】

【1】由句意可知用一般现在时。“我认为……没有”需要注意否定前移；as serious as和……一样严重”；污染pollution不可数，所以谓语动词用单数，故答案为I don’t think the pollution here is as serious as we imagine.

【2】根据后半句可知，事情已经发生，用一般过去时。though尽管，注意不能与but连用；get on well with sb.与某人相处得好；turn out结果是，注意无被动；have nothing to do with与……无关。故答案是Though he didn’t get on well with his classmates, it turned out that he had nothing to do with the event.

【3】本题表达事实，用一般现在时。The 17-hole bridge，注意连字符连接，hole不用复数；take up占据（时间或空间）；three quarters四分之三。故答案为This 17-hole bridge only takes up three quarters of the area.

【4】本题表达事实，用一般现在时。the second country第二个国家，作先行词，后面定语从句缺宾语，可以省略关系词，故答案是Japan is the second country we are going to visit in Asia.

【5】so far到目前为止，所以要用现在完成时。progress进展，不可数名词，所以谓语动词用单数形式；research调查。故答案是Has there been any progress in the research so far?

写含有宾语从句的完成句子时，需要注意主句时态，例如第二题，由于主句it turned out用的是一般过去时，所以宾语从句也需要用一般过去时，所以是had nothing to do with.