Câu hỏi:

Choose the letter A, B, C or D to complete the sentences

Scientists claimed that there __________ eight planets in our solar system.

Choose the letter A, B, C or D to complete the sentences

This water is __________ poisonous that people here can’t drink.

Choose the letter A, B, C or D to complete the sentences

Neil Armstrong is considered as the first person __________ on the Moon.

Choose the letter A, B, C or D to complete the sentences

The atmosphere on Mars is quite similar __________ that on Earth.

Choose the letter A, B, C or D to complete the sentences

Space __________ is the main vehicle for astronauts to travel on the Moon.

Choose the letter A, B, C or D to complete the sentences

The astronaut wears a __________ to protect him from the dangers of being outside in space.

Choose the letter A, B, C or D to complete the sentences

Scientists think it is possible to send humans on a __________ to Mars by the 20130s.