PRESENT PERFECT SIMPLE / PRESENT PERFECT CONTINUOUS

Many explorers have .............. to the North Pole.

Nobody is here. They have ........... to find new species in the rainforest.

Edmund Hillary and Tenzing Norgay got to the top of Mount Everest ..........

Kate has been studying endangered species ..............

He has been collecting fossils ........... he was a student.

Animal conservation .......... more important in the last 100 years.

Climate change ........... man glaciers to melt.

The Giant Panda ...... an endangered species for years.

The puppy ............ milk from bottle for two months.

The fisherman ..................... 50 kilos of fish since yesterday.

The scientists .................. their research yet.

Although modern ships know where icebergs are now, in the past icebergs ............. (be) one of the biggest dangers in the sea.

The famous Titanic ........... (sink) when it hit an iceberg in 1912

and many people ..................... (die)

Because of this incident, thirteen countries ........ (form) the International Ice Patrol in 1914.

This organisation ........ (give) information to ships about icebergs ever since.

Biologists ............. (study) icebergs for a long time to find out how they change sea life.

Recently, scientists .............. (show) that the water near icebergs is full of plankton, fish and other sea life.

Scientists ................... (notice) the way icebergs fall to pieces when they are in warmer waters.

One of the biggest icebergs ............... (break) off from the Ross Ice Shelf in Antartica in 2000.