Do you know ______ going to stay in London? No, I don't.Maybe a few days. [ ]

A. when he is

B. when is he

C. how long he is

D. how long is he

生后16h女婴，反复惊厥已4h，抽搐时手腕内屈，足踝直伸，抽搐停止神志即正常，一般状况可。血钙1.5mmol/L(6mg/dl)。心电图：QT时间 ＞0.19s。X线胸片：胸腺影缺如。

A．X-连锁无丙种球蛋白血症
B．婴幼儿暂时性低丙种球蛋白血症
C．胸腺发育不全
D．共济失调性毛细血管扩张症
E．普通变异型免疫缺陷病(CVID)