I first met John at my sister’s wedding. He _________ with the bridegroom at the time.

I don’t smoke now, but I _______ for more than twenty years.

The professor you referred to in the letter______ us students three lectures by next Monday.

Ever since my brother graduated from the university, he _______ in the present company for 15 years and he is now chief engineer of the company  .

A warm welcome _______to the Russian guests at the airport tomorrow morning.

－Why does the river smell terrible?
－Because large quantities of water______．

- Where have you been all day?
- We ________ some lovely children and it was dark by the time we got away.

- Remember the first time we ________, Ed ?
- Of course, I do. You ________ a song on the stage.

— That must have been a long trip. 
— Yeah, it _____ us a whole week to get there.

Through years of hard work, Mrs. Smith, who ____ as a secretary for five years, is general manager of the company now.