下列四个说法

①a∥α，b⊂α，则a∥b

②a∩α=P，b⊂α，则a与b不平行

③a⊄α，则a∥α

④a∥α，b∥α，则a∥b

其中错误的说法的是______．

During many sectors are foundering, the $21 billion videogame-software industry is booming, adding game developers at a rate of 2,500 a year in the United States alone.

A．When

B．Whereas

C．Would

D．While