Câu hỏi:

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

Our lives are in __________ because of pollutions

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

I love __________ at pictures of the galaxy very much.

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

I’m curious about the __________ space of the Earth.

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

Have you ever seen a flying __________?