100+(4-4)*8-9*9=решите

Напишите уравнение реакций, с помощью которых можно осуществить следующие превращения : 

P - Mg3P2 - PH3 - P2O5 - H3PO4 - Ca3(PO4)2

Рассмотрите окислительно-восстановительные процессы там, где они имеют место.

Put the verbs in brackets into the right tense form. Pay attention to the context.

1. "Why is she crying?" — "She made a lot of mistakes in the contract and her boss fired her. She (not be fired) if she (not make) so many mistakes in the contract."

2. "Why didn't they give Alice a pay rise?" — "She's not a very responsible person." — "You are right, if Alice (be) more responsible, they (give) her a better salary."

3. "What are you worrying about?" — "I have lent my car to a friend of my sister's." — "How silly of you! If you (not lend) your car to a stranger, you (not worry) now."

4. "I was nervous because I was going to talk to Kim, and I don't know her." — "You shouldn't have worried. If you (know) Kim, you (be) completely relaxed. She's a lovely person."

5. "It's a pity he doesn't speak English. The play was amazing." — "I don't agree with you. I think he (not enjoy) the play even if he (understand) English. It was such a drag!"

Обозначь знакомые орфограммы в словах и между словами.

Щука проглотила щётку.

Щётка ей щекочет глотку.

Удивительное дело!

Что же я за рыбу съела?