患者张某，男性，60岁。多年消化道溃疡便血病史，现突然昏厥，面色苍白，口唇无华，舌淡，脉细数无力。其急用方剂是（）

A.独参汤

B.参附汤

C.回阳救逆汤

D.通瘀煎

E.蛤蚧散

It's very late now. How long have you _____ computer games?[ ]

A. playing

B. be playing

C. played

D. been playing