-__in the box?
-There is a book in the box.
A What's B What is it C What's there D What are
__twice,the postman refused to deliver our letters unless we chained our dog.
A Being bitten B Bitten C Having bitten D To be bitten
__by the advance in technology;many farmers have set up wind farms on their land.
A Being encouraged B Encouraging C Encouraged D Having encouraged
__many times,he finally understood it.
A Told B Telling C Having told D Having been told
忘啦说明 我要的是大概 (尽量详细)的解释 答案是ABCD