Question

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

Answer 1

答案：A
解析：

while引导的句子中谓语动词为延续性动词或状态性动词；when引导的句子中谓语动词为延续性或非延续性动词，也可是状态性动词。bit是非延续性动词。