IV. Вставьте необходимое по смыслу слово (it, that/those, one). Предложения переведите на русский язык 1. ... is getting dark.
2. … is difficult to solve this problem without a computer.
3. … takes only one hour to get from St.Petersburg to Moscow by plane.
4. … should be careful when working with chemical substances.
5. The temperature of boiling milk is a little higher than ….. of water..