– Is John coming by train?– He should, but he _______ not. He likes driving his car.
The old sick lady entered the hospital, ______ her two sons.
_______ many times, he still couldn't understand.
Many things _______ impossible in the past are very common today.
The students in the university are all taking courses _______ a degree.
. _______ different kinds of pianos, the workers farther improved their quality.