...him it.A. offered B. offering C. to offer D. to be offered此题答案选B。我这里要问的不是为什么选B。我的问题是:John has really got the job because he showed me the official letter offering him it. 在这个句...
It, therefore, is necessary to stop frequently and sanitize low - temperature evaporators, and where sterile concentrated food are required, to resort to an additional preservation. It 是形式主语,两个不定式to stop frequently and sanitize low - temperature evaporators, and wheresteri...