【推荐1】_____ (explain) a hundred times, he still can’t understand it. (所给词的适当形式填空)

【推荐2】It is no use ________ (explain) the reason to him，for he is so stubborn. (所给词的适当形式填空)

【推荐3】He struggled ____ (explain) what he heard in his head. （用单词适当形式填空）

【推荐1】The retired man donated most of his savings to the school damaged by the earthquake in Yushu,____(enable) the students to return to their classrooms. (所给词的适当形式填空)

【推荐2】The fire lasted nearly a day,______(leave) nothing valuable. （用单词的适当形式完成句子）

【推荐3】___________ (judge) from the name, it is easy to guess that players can only join if they are fat. （所给词的适当形式填空）

【推荐1】She shouldn’t be ________(perform) so hard—she is 70, after all. (所给词的适当形式填空)

【推荐2】One part of his work is_______(make) monthly advertising budgets. （所给词的适当形式填空）

【推荐3】Yesterday, another student and I, _______(represent) our university’s student association, went to the meeting. (所给词的适当形式填空)