12. If he (to pollute) water, he (to do harm) to the environment. 13. Our streets (to be clean) if you (not to litter). 14. If Bob and Bill (to clean up) after picnics together with their friends, Ann (to invite) them to the party next Friday. 15. Kate (to meet) you, if I (to be) here tomorrow. 16. If people (to stop) throwing rubbish into the local river, clean water (not to be) a problem in this town. 17. They (to visit) London Eye if she (to come) to London next week. 18. I (not to buy a souvenir if the shop (to be ) closed next Wednesday. 19. Animals (not to be ) in danger if we (not to cut down) the trees. 20. You (to be ) healthy if you (not to eat) junk food. 21. If I I (to see) Jack tomorrow, I (to tell him about it. 22. They ( to pass) the exam if they (to work) hard.​

ascor3337    2   25.02.2021 13:20    5