Since she is seriously ill,we have to send for a doctor_.

问题描述:

Since she is seriously ill,we have to send for a doctor_.
A.for the first time B.at the same time C.at once D.from now on

C 马上
既然她病得很严重,我们不得不派人去请医生.
注:A 第一次; B 同时; D 从现在起
加油!不明白再问!