Помогите, пожалуйста))))))). Перепишите следующие предложения, переведите их на русский язык, помня о разных значениях глаголов to be, to have, to do.
1. Creation of new materials is of tremendous importance now.
2. The courses of study have to include mathematics, economics, and engineering subjects.
3. Did they come to see you last Sunday?
4. That science did accelerate markedly in the 19th century.