IV. Translate the sentences. Explain what kind of if-sentence is used.
1. Switching operations would have been performed with greater difficul¬ties if the diesel locomotive had not been designed.

At last holidays came! I was very happy!  I didn't have  to get up early in the morning and run to school. I could stay in the bed till midday. But I didn't want to sleep. There were a lot of things to do. The weather was fine so my friends and I went for a walk every day. It was fun! Then I spent a month in the country where my grandfather and grandmother lived. It was great. I drank milk and ate a lot of tasty food which my granny prepared for me. I have many friends in this village because I go there every holidays. We played football and tennis every day! There is a small river near the forest and we swam when the weather was fine. It was great!  I liked my holidays very much.  

Наконец наступили  каникулы! Я был очень счастлив!  Я не должен был вставать рано утром и бежать в школу. Я мог  оставаться в постели до полудня. Но я не хотел спать. Было так много дел. Погода была хорошая, так что мои друзья и я ходили гулять каждый день. Это было весело! Затем я провел месяц в деревне, где  живут мои дедушка и бабушка . Это было здорово. Я пил молоко и ел много вкусной пищи, которую моя бабушка готовила для меня. У меня много друзей в этой деревне, потому что я езжу туда каждые каникулы. Мы даже играли в футбол и теннис! Около леса есть небольшая речка. Мы купались, когда погода была хорошая. Это было здорово!  Мне очень понравились мои каникулы.

It was hot and we decided to walk in the shadow of the wall.
The temperature was over 90C degrees in the shade.
She felt as if every pair of eyes in the room was on her.
I just need to make a couple of calls.
In the morning, with a clear head, she had solved the problem.
Before hiring Sam as a chauffeur they made sure he had a clean driving licence.
Everybody stood in admiration watching the pod of whales on the horizon.
The excursion to the valley full of swarms of butterflies costs a lot.
If the bear growls, it is the sound of warning.
The crowd roared in delight.