She is very happy: her son (to finish) school.

•  had finished
•  has finished
•  was finishing
•  finished

When Nick came from school, his friends (to play) in the yard.

• were playing
•  played
•  have played
•  are playing

I never (to be) to the Bahamas.

•  have been
•  was
•  had been
•  was being

My sister (to spend) a lot of money yesterday.

•  was spening
•  has spent
•  had spent
•  spent

They ate all the apples which I (to bring).

•   brought
•  has brought
•  had brought
•  was bringing

Our grandmother (to cook) dinner from twelve till three yesterday.

•  has cooked
•  was cooking
•  had cooked
•  cooked

We already (to study) seven English tenses.

•  studied
• had studied
• have studied
• were studying

When the children (to have) dinner, they went for a walk.

• were having
• had
• have had
• had had

At this time yesterday, I (to talk) to my friend. 

• was talking
• have talked
• had talked
• talked

Columbus didn't know that he (to discover) America.

• is discovering
• has discovered
• discovered
• had discovered