Present Perfect Tenses

I ___ lately

• travel

• have traveled

• traveled

My brother ___ Cuenca many times

• visits

• has visited

• is visiting

I ___ wonderful since my baby was born

• felt

• have felt

• feel

Susane hasn´t come

• since last month

• last night

• in 5 years

Many explorers have _ to the North Pole

• go

• been

• going

Kate has been studying endangered species _.

• for 10 years

• since 10 years

• 10 years

He has been collecting fossils _ he was a student.

• for

• ago

• since

The Giant Panda _ an endangered species for years.

• has been

• was

The fisherman _ 50 kilos of fish since yesterday.

• has been catching

• has caught

The scientists _ their research yet.

• haven't finished

• haven't been finishing