1.He worked until 11 o'clock last night,--- for the speech .

1.He worked until 11 o'clock last night,___ for the speech .
Really He must ___ it now
A.to prepare ,finish B preparing,finish C to prepare ,have finished D preparing,have finished
2.Do be careful when you do that dangerous experiment,___ will
A don't B aren't C will D shall
3.Before he ___ war ,Argon asked his handsome son,Ferdinand,___ if he gets killed.
A left to ,will revenge B left to,to revenge C left for ,will revenge D left for ,to revenge