患者女，27岁。乘坐公交车时突发晕倒，被人送到医院急诊。体格检查：血压100/54mmHg，意识清醒，精神萎靡，心率100次/min，律齐，无杂音。2年前有类似发作1次，无其他疾病史。

通过初始评估后未能明确诊断，最合理的检查是（）

A.超声心动图

B.颈动脉窦按摩

C.直立倾斜试验

D.心电监测

E.运动试验

I didn't see Laura at the party last night. Do you know _______? [ ]

A. why didn't she come

B. what happened

C. when would she arrive

D. where she has been