сажали в час работали часов посадили всего
всего 5 часов
до обеда одинаково ? 100 деревьев
после обеда одинаково ? 150 деревьев
1) 100 + 150= 250 (дер) всего посадили
2) 250: 5 = 50 (дер) в час сажали
3) 100: 50 = 2 часа до обеда
4) 150: 50 = 3 часа после обеда
Прочитайте приведённые ниже предложения. Выберите и запишите
правильное слово. 1.Have you ever been to Australia? - Yes, I
(have/ had). We (sailed/ have sailed) there last September. 2. Have you written Exercise 4? - Yes. We (have done/ did) it at home yesterday.
3. I have explained the rule to Greg. I (have spoken/ spoke) to him after classes.
4. Mary (has received/ received) this task two days ago. I don't know if she (has already done/
already did) it. 5. (Have you rung/ Did you ring) the office manager yet? - Yes. I (have informed/
informed) her of your visit next week. 6. I (have done/ did) everything. Now I (am/ was) free and (can/ could) home. - Are you sure you (have done/ did) everything? 7.We first (saw/ have seen) this film five years
ago. 8. Has he handed in the project? - Yes, he has.
He (did/ has done) it last week.
9. Mother (gave/ has given) me some money. I can buy a new dictionary. 10. Helen (never swam/ has never swum) in the ocean