Questions 17 to 20 are based on the following passage. At the end of the passage you will be given 20 seconds to answer the questions. Now, listen to the passage.
When does the shopping center open on the weekday

A．Traffic on a busy street.
B．Jet plane taking off.
C．Sound that the average person can hear.
D．Sounds up to 80 decibels.

A．Because she wants to sell some homemade candy.
B．Because she is wondering how much it costs to send some vegetables.
C．Because she wants to get some information about sending a package.
D．Because she wants to buy some candy and vegetable.