题目

It________ last week that the haze (雾霾) in Beijing caused many problems.A. reports B. reported C. was reported 答案：【答案】C【解析】句意“上周据报道北京的雾霾造成了许多问题”。根据last week可知，用一般过去时，排除A；本句话中it作形式主语，真正的主语为the haze (雾霾) in Beijing caused many problems。且主语与report之间为被动，且根据it was reported that“据报道”可知，故选C。musical [　　] A．pollutionB．newspaper C．conclusionD．pull