I want to ring him _______ to know the reason why he rang _______ while I was speaking yesterday[ ]

Edison was imaginative enough new ideas .

e stuck at the airport because of the heavy fog,otherwise we ________ here in time for the conference.

The way he did it was different ____ we were used to.

The fireman succeeded in saving all the people in the house on fire, _______they knew they were in great danger themselves