问题
选择题
Jasmine was holidaying with her family in a wildlife park__________she was bitten on the leg by a lion.
A．when
B．while
C．since
D．once
答案
A
Jasmine和家人在野生动物园度假的时候，被狮子咬伤了腿。when在本句中为并列连词，意为：and just at that time。如：
I was wandering through the street when I caught sight of a tailor’s shop.(并列连词)
="I" caught sight of a tailor’s shop when/while/as I was wandering through the street.(从属连词)