根据对话内容,在空白处填入恰当的句子,使对话完整、通顺。A:Hi, Alex.You look tired.Why?B:Because I stayed up late last night.A:?B:I had to finish my homework.I'm taking a class online these days.A:Really!?B:I'm taking an art class.A:Is it difficult to learn?B:.But I have to spend a lot of time doing homework.A:?B:I think it's very useful.I can learn a lot about art.A:That's great.Is the class cheap?B:Yes,it's cheap,and also helpful. ?A:Great.I'd love to.
答案:【1】What did you do【2】What class are you taking【3】No, it isn't【4】What do you think of the class【5】Would you like to take it with me