SOLAR SYSTEM

UNIVERSE

MARS EXPLORATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What principal part of the verb be does this sentence contain?Some astronauts are still in the space station.
A
past
B
past participle
C
present
D
present participle
Explanation: 

Detailed explanation-1: -The ISS is a place where astronauts do science experiments while in space. Astronauts also learn to eat, exercise, and do experiments while floating in the air. They also practice riding in special vehicles that are just for space. These vehicles bring supplies like food and fuel to the ISS.

Detailed explanation-2: -An astronaut’s primary job while on the space station is to conduct scientific experiments and maintain the space station. When not working, astronauts do a lot of the same things we do on Earth. Astronauts also complete a two-hour daily exercise program to remain fit.

Detailed explanation-3: -There are currently 7 people onboard the ISS. The crew of the ISS is usually made up of seven people from different countries, reflecting the collaborative and international nature of the space station.

Detailed explanation-4: -NASA scientists know that for humans to travel through space, astronauts have basic needs. Astronauts must have oxygen, food, water, and rest.

Detailed explanation-5: -Astronauts can’t cry the same in space as they do on Earth. They can’t consume common items like bread and soda. Astronauts can’t write with regular pens. They can’t coordinate their sleep schedules with the rising and setting of the sun. More items •05-Feb-2019

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