Задать общий вопрос к предложениям: 1. a lot of people can run a marathon. 2. people run marathons in different cities.

In which cities people run a marathon ?

New Year's Eve in Scotland. In Scotland New Year is very important holiday. Scots take New Year's Eve very seriously. There is a New Year Eve Fire Festival; men parade with blazing tar (burning barrels of tar), they throw them into a great bonfire. The "First Foot" then set out.In Scotland "first foot" is a common custom; it is considered lucky if a dark haired man is the first to set foot in the house after midnight, bringing a coin, piece of  bread, or a lump of coal as a symbol of plenty for the year.​

Объяснение:

A.

1. Repeat this rule. It is very important.

Указательная функция; как личное местоимение.

2. Your solution of this task is correct. Explain it, please.

Указательная функция; как слово "это".

3. It was cold in the laboratory yesterday.

"It" в начале безличного предложения.

4. In England it rains more often than it snows.

"It" в начале безличного предложения (в обоих случаях).

5. What is this? It is a new computer.

Как слово "это"; как личное местоимение.

В.

1. It is difficult to say which month is the best.

"It" в начале безличного предложения.

2. It is my brother who works at this plant as an engineer.

Как личное местоимение; указательная функция.

3. It will take them plenty of time to solve the problem.

"It" в начале безличного предложения.

4. What is there on the wall? It is a clock.

Как личное местоимение.

5. It was reported that the delegation had arrived in Kyiv.

"It" в начале безличного предложения.