I knew that he ____ waiting for someone.

1.   ?    was
2.   ?    is
3.   ?    would
4.   ?    has been

____ Brenda last week?

1.   ?    Did you see
2.   ?    Have you
3.   ?    Were you seeing
4.   ?    Do you saw

They met when they ____ in Oxford.

1.   ?    studied
2.   ?    were studying
3.   ?    had studied
4.   ?    study

As soon as she came in I knew I ____ her before.

1.   ?    have seen
2.   ?    had seen
3.   ?    saw
4.   ?    seen

My feet ached because I ____ for more than two hours.

1.   ?    walked
2.   ?    had walked
3.   ?    had been walking
4.   ?    was walking