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 (explain) it to my classmates. 小题2:If you tell him the (true),he will be angry. 小题3:You may ask your teacher for help. He will give you a few (value) suggestions. 小题4:People in the past suffered from hunger and (ill). 小题5:I invited Sally to my party, but she refused (accept) my invitation.