Câu hỏi:

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

It was so kind of him __________ me when I was homeless

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

Have you ever seen a flying __________?

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

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

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

I love __________ at pictures of the galaxy very much.