СРОЧНО. найти производную y=sqrt x (2sin x + 1)

В каком слове правописание суффикса определяется тем, что образовано от глагола первого спряжения?

1.складывалась

2.бороющихся

3. любимых

4.доходчиво

Текст Yesterday was Friday. The weather was fine. Bill and Taras walked in the streets and visited some places of interest. Bill`s parents were at work. So Kate cooked the dinner. Bill and Taras helped her. After dinner they cleaned the rooms and washed the plates. Then Kate listened to music and phoned her friends. Bill and Taras played computer games with Nick and Vicky. In the evening Taras and the Browns watched TV. The film was very interesting and Taras liked it a lot. Задание к тексту : Answer What day was yesterday? Was the weather fine or bad? Were the boys at home in the morning? Where were Bills parents in the daytime? Was Kate in? Where were the Browns yesterday evening? Can you say what the film was about?

Нужно вставить слова must или mustnt.

A real friend ____ always help you if you need help.

A real friend_____ tell your secrets to anyone.

A real friend _____ make you happy if you are sad.

A real friend _____ listen to you if you have a problem.

A real friend _____ tell you lies.

A real friend _____ share his/her bicycle with you havent got one.

Заранее  спасибо!