SiH4 + O2 помогите решить, пожаалуйста))

что создавалось трудом ремесленника?

поставить слова в скобках в нужное время:

1.When my mother ...(to come)home from work,I...(to lie)in bed because I didn't feel good.

2.He...(not / to write)his test yet.He ...(to do)the last exersise now.

3.Look!Somebody...(to want)to open the door of your car.

4.I ...(not / understand)what you ...(talk)about.

5.Where he ...(to come)from?

6.When the next English course ...(to start)?

7.Have you heard him...(to recite)poems at the concert?

8.The boy was not allowed ...(to join)the team.

9My mum let me ...(to stay)out till 10 on Saturdays but on weekdays she wanted me...(to work hard).

10.They made me ...(to tell)the truth.

11.I didn't want them ...(to think) I was wrong.

Сумма первых пяти членов арифметической прогрессии равна 240, а сумма первых десяти членов этой прогрессии равна 555. Найдите сумму второго, шестого и седьмого членов этой прогрессии.