present perfect

The alien ____ ________ (study) English.

• has studied

• have studied

• has study

• have studying

The astronaut ____ ________(not/explore) space.

• Have not explored/ haven´t explored

• Has not explored/ hasn´t explored

• haven´t exploring

• hasn´t explore

We ____ ______________ (miss) the flight to Mars.

• have miss

• has missing

• have missed

• has missed

She ____ ________ (live) on Saturn, but never on Earth.

• has living

• has livied

• have lived

• has lived

I ____ _____ (travel) on a spaceship three times.

• am traveled

• have traveling

• have traveled

• has traveled

Scientists ___ ____ (work) for many years to send astronauts to Mars.

• has worked

• have worked

• have working

• have work

James. _____ _________ (save) a lot of money to buy a star.

• Has saved

• have saved

• Has saving

• Have saving

I ____ _________ ( not/ try) to visit Jupiter.

• Hasn’t tried

• Hasn’t try

• Haven’t tried

• Haven’t try

The explorer ____ __________ (carry) a very heavy a bag across the mountains.

• Have carry

• Has carry

• Have carried

• Has carried

Mrs Miriam ____ _________ (not/ pass) any of her exams.

• Hasn’t passed

• Haven’t pass

• Haven’t passed

• hasn’t pass