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had flown
walked
had been sent
made
put
had sent
became
had been launched
was established
had travelled
11.Had flown/walked
12.Had been sent/make
13.Put/had sent
14.Became/had been launched
15.Was established/had travelled
Gửi ạ
Bài 1 :Put the verbs in brackets in the past simple tense os past perfect tense
1. Neil Armstrong and Buzz Aldrin (collect)......had collected.............. some moon dust samples before they (return)....returned......... to Earth.
2. By the time Yang Liwei (become)........became......... the first person sent into space by the Chinese space program in 2003, NASA had already (send)........sent............ over 100 people.
3. After the spaceship Soyuz 37 (be).......had been...... in orbit around the earth, Pham Tuan and Viktor Gorbatko (conduct)........conducted...........some experiments.
4. When we (arrive)...............arrived...... in Kennedy Space Center, the space shuttle had already (launch)....been launched............. into space.
5. Dennis Tito had already (complete).......completed........ 900 hours of training by the time he (fly).........flew......into space in 2001.
Each sentence below contains an error. Underline it and write the correct answer in the space provided.
1. The astronaut visited=>WHO VISITED our school yesterday morning has flown into space four times.
2. Pham Tuan had been=>WAS awarded the title Hero of the Soviet Union after returning from space.
3.The site which=>WHERE the space shuttle is going to be launched next week attracts a lot of visitorS.
4. When=>BEFORE Alan Shepard travelled into space in May 1961, Yuri Gagarin became the first person on April 12th , 1961.
5. The rocks WHICH my father always carries them=>0 in his bag came from outer space
