CONIUGA IL VERBO TRA PARENTESI AL TEMPO GIUSTO SCEGLIENDOLO TRA PRESENT PERFECT E PAST SIMPLE Esempio: 
I   (to be) very shy when I was young > I WAS very shy when I was young.

1) Last night I (to dream) about your new car.
LAST NIGHT I DREAMT ABOUT YOUR NEW CAR
2) We (see) a wonderful film last week.
WE SAW A WONDERFUL FILM LAST WEEK
3) I (to know) Sam for twenty years. (!Duration form!)
I'VE KNOWN SAM FOR TWENTY YEARS
5) They (to build) this tower in 1965.
THEY BUILT THIS TOWER IN 1965
6) (you/ever/to be) to Mexico?
HAVE YOU EVER BEEN TO MEXICO?
7) (you/ to see) Tom this week?
HAVE YOU SEEN TOM THIS WEEK?
8) They (to play) tennis when they were at college.
THEY PLAYED TENNIS WHEN THEY WERE AT COLLEGE
9) She (to be) in London last night.
SHE WAS IN LONDON LAST NIGHT
10) There (to be) many people at the party yesterday.
THERE WERE MANY PEOPLE AT THE PARTY YESTERDAY.