Câu hỏi:

Choose the best answer A, B, C or D to complete the sentences.

A ………. is an enormous system of stars in outer space.

Choose the best answer A, B, C or D to complete the sentences.

Do you know the reason ……. humans are interested in Mars and other planets in thesolar system?

Choose the best answer A, B, C or D to complete the sentences.

Aircraft flying in …….. arcs create microgravity for tests and simulations that last 20-25seconds.

Choose the best answer A, B, C or D to complete the sentences.

Yuri Gagarin became the first person to eat and drink in …………

Choose the best answer A, B, C or D to complete the sentences.

Marie, ................ I met at the party, called me last night.

Choose the best answer A, B, C or D to complete the sentences.

That’s the doctor for ................ Cliff works.

Choose the best answer A, B, C or D to complete the sentences.

She’s the woman ................ sister looks after the baby for us.