女，73岁。阵发性房颤7年余，一日在活动中突发右侧上下肢无力，伴言语不清和头痛，急诊头颅CT无异常。该患者诊断最可能的是（）

A.脑血栓形成

B.脑栓塞

C.蛛网膜下腔出血

D.急性脑膜炎

E.脑动脉瘤破裂

  I’d love to go to the English evening. But I’m a little ________, because I will be asked to sing an English song in front of the whole school.

A．tired

B．sad

C．nervous

D．pleased