Ngọc My

* Put the verbs in brackets into the correct tense.
1. Gagarin (fly) ……………………into space eight years before Armstrong (walk) ……………………on the moon.
2. Fruit flies (be sent) ……………………into space before Laika the dog (make) ……………………her space journey.
3. When the USA (put) ……………………the first human on the moon, Russia (send) ……………………the first human into space.
4. By the time Laika (become) ……………………the first astronaut dog, fruit flies (be launch)……………………into space.
5. When Virgin Galactic (establish) ……………………in 2004, Dennis Tito already (travel)……………………into space.

Sunn
19 tháng 1 2022 lúc 20:15

had flown

walked

had been sent

made

put

had sent

became

had been launched

was established

had travelled

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