3. Вместо подчеркнутых слов поставьте личное местоимение в именительном или объектном падеже. 1. Professor N. says that mathematics is an important subject for technical students. 2. These lines are short. 3. The length of the line is ½ of a meter.
1. He says that mathematics is an important и т.д. 2. They are short. 3. It is 1/2 of a meter
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