Вопрос школьника по предмету Математика
в классе всего 30 учеников .На уроке математики 20% учеников получили “5”
,а 50% учеников получили “4 ” . Сколько всего учеников подучили “5”и“4”？
Ответ учителя по предмету Математика
1) 20+50=70(%)-получили 4 и 5;
2) 30•0,7=21(человек) — получили 4 и 5.
Ответ: 21 человек.
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соответствующую номеру выбранного вами глагола или
сигнального слова в Past Simple, Present Perfect или Present Perfect
Continuous .
25. My father is a writer. He … many books.
a) wrote
b) have written
c) has written
26. We … a holiday last year.
a) hadn’t
b) didn’t have
c) haven’t been having
27. I … football yesterday afternoon.
a) played
b) have played
c) haven’t played
28. He … fish since 4 a.m.
a) caught
b) has caught
c) has been catching
29. … you ever … a famous person?
a) Did … met
b) Were … meet
c) Have … met
30. – You look very pale.
— I … very hard.
a) have worked
b) has been working
c) have been working
31. – Is Ann here?
— No, she … yet.
a) didn’t come
b) hasn’t come
c) hasn’t been coming
32. William Shakespeare … from 1564 to 1616.
a) lived
b) did live
c) has lived
33. She … money for her holiday for 3 months. … she … enough?
a) has saved; Has … saved
b) has been saving; Has … saved
c) has saved; Has … been saving
34. We are not hungry. We … breakfast today.
a) had
b) have no
c) have had
35. I haven’t been to my native town … my childhood.
a) already
b) since
c) never
36. – Have you written to John … ?
— Yes, I’ve … finished a letter to him.
a) already; yet
b) yet; already
c) yet; ever
37. Tom has been playing football … 2 years.
a) since
b) before
c) for
38. – Alex, this is Mary.
— Yes, i know. We’ve met … .
a) since
b) before
c) for