选择合适的单词填在横线上,补全句子或对话。
busy Where back When help
(1)
— do you go to bed?
—At 9:30.
(2)
You need a robot to you.
(3)
When did you go to school after lunch?
(4)
— is your pen?
—It's in my pencil box.
(5)
You're so .
答案: 【1】When
【1】help
【1】back
【1】Where
【1】busy