根据句意从括号中选择恰当的介词填空 1. I go to school __________(at / on) 7:30 every morning. 2. The doctor would like to meet her __________(between / among) 8:00 and 9:00 tomorrow morning. 3. -When did Hong Kong return to China? -__________(In / On) July 1st, 1997. 4. In the West, there is lots of excitement __________(in / on) Christmas morning when children get up very early to open their presents. 5. The Smiths have lived in China __________ (for / since) five years.