56.This machine is very easy ________. Anybody can learn to use it in a few minutes.
A. operating B. to be operating C. operated D. to operate
【答案】D。解析:在句型“主语+be+adj+to do”中,如果这个主语是动词do的逻辑宾语,故用主动表被动,所以选D。
57.Thank you for all your hard work last week. I don’t think we ______ it without you.
A. can manage B.could have managed
C. could manage D.can have managed
【答案】B。解析:根据题干中所给出的时间last week可知我们已经做完了工作,故排除A、C两项,再结合could have done表示虚拟语气以及与前面的I don’t think…,故说话者想表达的意思是:离开了你,我们本不可能完成这项工作。故答案为B项。
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