Посмотрите видео и ответе на во ответов несколько)
Чтобы защитить белых медведей от вымирания, мы должны...
1)reduce the rate of climate warming
2)reduce the final increase in temperature
3)support them with food
4)release them to Antarctica
5)breed them as more as possible
6)reduce greenhouse gas emissions
7)ban any communication between humans and them
8)build more zoos

ответ: Obviously, my work involves traveling a lot. It can be quite physically tired, but I enjoy dealing with customers, except when they become violent. Luckily this doesn't happen often.

 I like working with figures, but my job is much less boring and routine than people think. The work involves a lot of human contact and teamwork, working with other managers.

 Of course, it involves getting up quite early in the morning. But I like being out in the open air. And I get a lot of exercise!

 You've got to think in a very logical way. The work can be mentally tiring, but it's very satisfying to write a program that works.

 I love my job. It's very stimulating and not at all repeating: no two days are the same. It's good to see the children learn and develop.

Объяснение:

Past Simple

1 We went to the cinema yesterday. - Мы вчера ходили в кино.

2 I had a party last Sunday. - У меня была вечеринка в воскресенье.

3 They played football two hours ago. - Они играли в футбол 2 часа назад.

4 I fed my cat ten minutes ago. - Я покормил(а) кошку 10 минут назад.

5 My friend phoned me two days ago. - Мой друг звонил мне 2 дня назад.

Present Perfect

1 I have just had lunch. - Я только что пообедал(а).

2 My parents have bought a new car. - Мои родители купили новую машину.

3 He hasn't done his homework yet. - Он  еще не сделал домашнее задание.

4 Have you ever seen a giraffe? - Ты когда-нибудь видел жирафа?

5 I've watched this film three times already. - Я смотрел(а) этот фильм уже три раза.

Объяснение: