--- We ______ that you would fix the TV set this week.

　--- I’m sorry. I ______ to fix it this week, but I’ve been too busy.

A．had expected; had intended

B．are expecting; had intended

C．expect; intend

D．expected; intend

男性，30岁，10年来阵发性心悸，每次心悸突然发作，持续半小时至3h不等，此次发作持续半小时而来就诊。检查：血压90/60mmHg，心率200次/分，心律绝对规则，无杂音，肺(-)。

假设：心电图示QRS波群宽0.14～0.16s，起始部粗钝，R-R间期绝对不等，此时心律失常最大可能是

A．预激综合征伴心房纤颤
B．阵发性室性心动过速
C．心房纤颤伴室内差异性传导
D．心房纤颤伴束支传导阻滞
E．室上速伴差异传导