―Look! It looks as if it _______ going to rain. We must hurry. ―OK.
As we know, success often comes after ______ failure; so don’t be so upset about _______ failure of this matter.
不填; the
不填; a
It was in the street _______ I met one of my friends yesterday.
The beauty of the city is _______ my description.
You can't imagine what great trouble I had _______ his address.
. Tommy’s parents thought he was at school, but _______ he was in an Internet bar.