TENSES

"Could you turn off the stove? The potatoes ......... for at least thirty minutes."

• are boiling

• were boiling

• have been boiling

• boiled

Christopher Columbus ......... America more than 500 years ago.

• discovered

• has discovered

• had discovered

• had been discovering

I was tired when you saw me because I ......... for the exam.

• studied

• have been studying

• had been studying

• would study

My boss's plane ......... at 10:15 tomorrow morning, but I cannot pick him up.

• arrives

• is arriving

• will be arriving

• arrived

He found a watch when he ......... in the street.

• was walking

• had been walking

• had walked

• walked

My sister and her husband ........... over to my house for dinner tomorrow evening.

• came

• come

• going to come

• are coming

The film .......... by the time we .......... to the cinema.

• had already started/got

• already started/ had gotten

• had already started/had gotten

• has already started/ got

Dolphins .............. in BC waters for millions of years, and are still common today.

• lived

• used to live

• are living

• have lived

By the end of this March, he ........... here for 20 years.

• has been living

• will live

• will be living

• will have been living

While John was reading, his sister ............ the piano.

• played

• is playing

• was playing

• had played