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Mom: Tim! Are you ready for a big, big surprise（惊喜）?

Tim: I guess so. What is it?

Mom: It's something that you really need!

Tim: A new baseball glove?

Mom: No.

Tim: A cell phone（手机）?

Mom: No! You don't need a cell phone---you're too young for that.

Tim: OK, I give up（放弃了）, Mom.

Mom: You’re gonna get...braces（牙套）!

Tim: Braces? Mom! Have you checked out a calendar（日历） lately?

Mom: Why?

Tim: I start high school in two weeks! High school! I can't have braces now!

Mom: Now is a good time for us to pay for them. They're expensive, you know.

Tim: I don't care（在意，关心） if they're free! I don't want them.