. The traffic in the city was ____ today, so Mary got home earlier than usual.
One of the most important problems we will have to solve is ____of students’ learning method.
The house is nice, but ______ too small for a family of five.
______ from what he said, he must be the thief who has stolen the car.
They were surprised that a child could work out the problem ______ they themselves couldn’t.
--- I hear Jane has gone to the Holy Island for her holiday. --- Oh, how nice! Do you know when she ______ ?