Ben told Linda that Marcia ______a surprise party for her the next evening.

A．was going to have

B．would be

C．was going to be

D．would go to have

女婴，胎龄31周，胎膜早破21小时，顺产，出生体重1500g，生后4小时出现呼吸急促、呻吟及发绀，并进行性加重，而且伴呼吸暂停2次。查体：呼吸促，三凹征阳性，双肺呼吸音低，心率150次/分，四肢肌张力低。

若经口气管插管，插管深度一般应为（）

A.5～6cm

B.7～8cm

C.8～9cm

D.9～10cm

E.10～11cm