题目内容
补全对话，每空格一词
-________ ________ go on a trip to Beijing?
-That's a good idea.
-Do they sing an English song before each class?
-Sometimes they ________, sometimes they ________.
-Have a great day.
-Thank you. ________ ________.
-Would you like to see my new stamps?
-Yes, I'd ________ ________.
