使用顺序：从下至上
B2-Handling customer complaints.mp3
B1-Depositing money in a bank account.mp3
B1-Asking about graduate school_0.75
B1-Asking about graduate school_1.0
A2-Can you print this for me_0.75
A2-Can you print this for me_1.0
A2-Getting readying for an online meeting_0.75
A2-Getting readying for an online meeting_1.0
A2-Canceling a hotel booking_0.75
A2-Canceling a hotel booking_1.0
A2-Making a dinner reservation_0.75
A2-Making a dinner reservation_1.0
A2-Would you like a drink_0.75
A2-There’s a package for you_0.75
A2-There’s a package for you_1.0
A2-Talking about a breakup_0.75
A2-Talking about a breakup_1.0
A2-Getting ready for take-off_0.75
A2-Getting ready for take-off_1.0
A2-Asking for the address_0.75