Tenses (Present perfect with others): Space Exploration 2

The astronauts ___ (live) in the space station for several months.

• have lived

• are living

• live

• lived

Answer explanation

The astronauts has lived in the space station for several months.

The Mars robot___ (explore) the surface of the planet at this moment.

• has explored

• is exploring

• explores

• explored

Answer explanation

The Mars robot is exploring the surface of the planet at this moment.

The scientists ___ (study) the possibility of life on the planet for years.

(possibility: khả năng)

• have studied

• are studying

• study

• studied

Answer explanation

The scientists have study the possibility of life on the planet for years.

NASA ____ (sent) 3 robots to Mars so far.

• has sent

• sent

• sends

• is sending

Answer explanation

NASA has sent 3 robots to Mars so far.

The International Space Station ___ (orbit) around Earth for more than 20 years.

(International Space Station: Trạm Vũ trụ quốc tế)

• has orbited

• orbited

• orbits

• is orbiting

Answer explanation

The International Space Station (ISS) has (orbit) around Earth for more than 20 years.

Every day, the ISS ___ (orbit) around Earth 16 times.

• has orbited

• orbits

• orbited

• is orbiting

Answer explanation

Every day, the ISS orbits around Earth 16 times.

NASA ___ (launch) the first telescope to detect exoplanets in 2009.

(telescope: Kính viễn vọng)

• has launched

• launches

• launched

• is launching

Answer explanation

NASA has launched the first telescope to detect exoplanets in 2009.

The Milky Way galaxy ___ (contain) billions of stars.

(contain: Chứa đựng, có)

• has contained

• contains

• contained

• is containing

Answer explanation

The Milky Way galaxy contains billions of stars.

--> Đây là một sự việc (fact) tự nhiên.

The robot in Mars ___ (take) thousands of photos since it landed.

• has taken

• takes

• took

• is taking

Answer explanation

The robot in Mars has taken thousands of photos since it landed.

No one ____ (visit) Moon since 1972.

• has visited

• visited

• is visiting

• visits

Answer explanation

No one has visited Moon since 1972.