_________is defined as an expression of human emotion which is condensed into fourteen lines. ______.

单项选择题Syntax is the study of_______.

单项选择题The novel For Whom the Bell Tolls is written by______.

单项选择题The speech act theory was first put forward by_______.

单项选择题The Prime Minister in Britain is head of______.

单项选择题William Sidney Porter known as O. Henry, is most famous for_______.