<span>1. If we want to become good specialists,we must get knowledge of different methods of cooking. - I тип
2. I should not have gone to that cafe if l were you. - II тип
3. If you order your cream tea,you will get a pot of English tea, some scones,and large dishes of strawberry jam and thick cream. - I тип
4. If he knew that it was dangerous, he would not eat that exotic dish. - II тип</span>
<span>1) Teddy's last holidays were very interesting. He was in Russia. He traveled there by plane,by train and by car. 2) Yesterday morning I walked a lot in the park. 3) There was no milk in the shop in the evening. 4) In summer we visited a lot of places in London. 5) Did your sister play the piano when she was five? 6) Did they help their parents when they were on holidays?</span>
There is a boy and girls in the room.или There are boys and girls in the room. или There is a boy and a girl in the room. Предложение изначально неправильное.При перечислении первым стоит" a boy",с ним согласовывается форма there is.