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.

伤食吐的症状是

A．呕吐食物或奶瓣，呈喷射状，量多
B．食入即吐，呕吐气秽，酸臭
C．食入即吐，吐物为不消化食物，吐后觉快
D．朝食暮吐，吐物为宿食
E．食入腹胀，恶心呕吐