介绍:
Dialogue 1
A：Oh, it’s six o’clock. I’ve got to go.
B：Don’t worry. Please stay for supper.
A：My parents are waiting for me. I’m sorry. I’ve got to go.
B：All right. Come here again when you have time.
Dialogue 2
A：We’ve got to do our homework now.
B：You are right. What’s the homework?
A：The teacher asked us to make sentences.
B：Now, I remember. Let’s do it.
Dialogue 3
A：You’ve got to buy a new bike.
B：Is there anything wrong with my old bike?
A：Look here. It’s broken. I almost fell off the bike.
B：Were you hurt?
A：No, I wasn’t.
B：Thank goodness.
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