He was about halfway through his meal ____ a familiar voice came to his ears.
A．why B．where
C．when D．while
He found it increasingly difficult to read, ____his eyesight was beginning to fail.
A．and B．for
C．but D．or
We had to wait half an hour ____we had already booked a table.
A．since B．although
C．until D．before
This is a junior school. You should go to a senior school____ girls of your age.
A．for B．about
C．from D．to
You have failed two tests. You’d better start working harder, ____ you won’t pass the course.
A．and B．so
C．but D．or
Between the two generations, it is often not their age,____their education that causes misunderstanding.
A．like B．as
C．or D．but
