8 Usually passengers are required toarrive at _____ one hour before ______ takes off

下列语句中，标点符号使用正确的一项是(　　)

__________ is it from here to Yangzhou Museum — About 20 minutes by bike.

Li Na returned to Wuhan after the Games,________, as is known to us, she had been brought up and trained to be a gold medalist of tennis[ ]

The way Della thought of_______enough moneywas to sell her beautiful hair.