Identify the relative clauses in these sentences. (Some contain more than one) Rewrite them as participle or infinitive clauses

01 Đề bài:

4. Identify the relative clauses in these sentences. (Some contain more than one.) Rewrite them as participle or infinitive clauses.

(Xác định mệnh đề quan hệ trong các câu này. (Một số chứa nhiều hơn một) Viết lại chúng dưới dạng mệnh đề phân từ hoặc nguyên mẫu)

1. The word astronaut, which is formed from two Greek words, means ‘star sailor’.

2. Only flights which reach an altitude of 100 km or more are considered space flights.

3. NASA astronauts are given a difficult training programme which they have to complete after twenty months.

4. Astronauts who spend long periods in space do exercises which have been designed to keep them strong.

5. Spacecraft which intend to escape from Earth’s gravity need to reach a speed of about 40,000 km/h.

6. The film Apollo 13, which was made in 1995, is a very interesting film on space travel that should be seen.

02 Bài giải: