根据句意及首字母填写所缺单词。 小题1:Can I have a glass of orange j________? 小题2:It took me about an hour to f_________my homework. 小题3:The maths problem is very d___________, I can’t do it. 小题4:I’m very tired after a long walk,I want to have a r__________. 小题5:His father is a fire f________.