We must be off . It’s eight o’clock already.A. a moment ago B. all of a suddenC. in no tim

问题补充：

We must be off . It’s eight o’clock already.

A. a moment ago

B. all of a sudden

C. in no time

D. all right

答案：

A. a moment ago

B. all of a sudden

(答案→)C. in no time

D. all right

解析：本题考查副词短语辨析。a moment ago刚才；all of a sudden出乎意料的；in no time立刻，很快；all right正确的。句意：我们必须立刻走。已经八点整了。in no time立刻；马上。故选C。