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

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

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

“What subject do you find the most difficult?” My mother asked.

⇒ My mother asked what subject ____________ the most difficult.

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

There have been some traces proving the __________ of aliens.

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.