с английским! Исправьте ошибки в некоторых предложениях.

If space technology 1(had been) more advanced, humans could have settled in space decades ago. They could 2(have founded) colonies on other planets if natural conditions there 3(had been) suitable for sustaining life. People 4(could inhabit) space stations there 5(were) it no for need to send regular and costly supply expeditions here. They 6(can) be using mineral resources from space bodies if they 7(had not worked) out a way to deliver the resources to Earth. If people 8(were less) united on Earth, they 9(would be more) cooperative in space programmes and 10(would have advanced) a lot more in their achievements. We would have learned how to stop global warming. We would 12(have been stopping) ozone windows from growing in the atmosphere decades earlier. We 13(would) pollute the Earth with rubbish. Finally, we 14(would) consider the Earth our home.

The PRESENT PERFECT TENSE is formed with a present tense form of "to have" plus the past participle of the verb (which can be either regular or irregular in form). This tense indicates either that an action was completed (finished or "perfected") at some point in the past or that the action extends to the present: I have walked two miles already [but I'm still walking]. I have run the Boston Marathon [but that was some time ago]. The critics have praised the film Saving Private Ryan since it came out [and they continue to do so].

1  . was the first prize won by John.
2. are our exercises  corrected each night by the teacher.
3. is The mail  delivered at ten o’clock.
4. will  the construction of the bridge be finished this year.
5. will the contract  be signed tomorrow.
6. What was listened to with great interest.
7. is the film  much spoken about.
8. Are all the letters looked through by the secretary.
9.were all these books  published by this publishing house.

1. The first prize wasn t  won by John.
2. Our exercises aren t corrected each night by the teacher.
3. The mail isn t  delivered at ten o’clock.
4. The construction of the bridge won t be finished this year.
5. The contract won t be signed tomorrow.
6. His report wasn t  listened to with great interest.
7. The film isn t much spoken about.
8. All the letters aren t looked through by the secretary.
9. All these books weren t published by this publishing house.