[解析]
A B
Text 7
A:Hey,Peter,I'm sorry!
B:Hi,Diana,what's wrong?
A:We were going to Hong Kong this weekend,but I'm afraid I can't go.
B:How come?
A:I have a really big geography test and I have to study for it.
B:We can go next week instead.
A:No,I don't want to ruin your weekend.You go ahead and please take the book I bought to my friend Sally.Tell her I have to study all weekend,because I can't afford to fail the test.
B:OK,then I'll go with Dan.But it's a pity you can't come.