问题补充：
根据句意，用括号内所给单词的适当形式填空。
【小题1】The problem is so easy that I have no difficulty explaining(explain) it to my classmates.
【小题2】If you tell him the truth(true)，he will be angry.
【小题3】You may ask your teacher for help. He will give you a few valuable(value) suggestions.
【小题4】People in the past suffered from hunger and Illness(ill).
【小题5】I invited Sally to my party, but she refused to accept(accept) my invitation.
答案：
解析：
【小题1】have ( no ) difficulty doing sth. 是固定用法，表示在做某事上有（无）困难。
【小题2】the 作为冠词，后面应接名词。根据句意应该是真相的意思。所以应该用truth。但要注意true去掉e再加th。
【小题3】value是价值的意思，词性名词。根据句意应该是有价值的建议，所以应用形容词性valuable。
【小题4】ill是病的，生病的意思，形容词；根据句意应该是疾病，名词。与hunger保持一致。
【小题5】refuse to do sth.拒绝做某事，固定用法。
根据句意 用括号内所给单词的适当形式填空。【小题1】The problem is so easy that I have no difficulty explaining(expl
