Complete the dialogues with one word in each gap

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Sue: I'll take them, please.
Exercise 9: Complete the dialogues with one word in each gap.

Dialogue 1
A: We're going to the disco. How about coming with us?
B: That's a great idea!

Dialogue 2
A: We're going on a day out to Oxford. Why d__
B: I'm sorry. I've got a test on Monday.

Dialogue 3
A: We're going to the cinema tomorrow. W__
B: OK,