Упр.11 Юнит 3 Step 4 ГДЗ Rainbow English 9 класс
Complete the text with the appropriate forms of the verbs in the asterisks.
An invention is a machine, tool, or system that someone (1) ___, or designed for the first time. An invention may (2) ___ the creation of something completely new or an improvement of something that someone else (3) ___. Many important inventions (4) ___ from the work of one person; others (5) ___ by many people (6) ___ as a team. We never (7) ___ never know who (8) ___ of many of the very early inventions, such as the wheel and the plough.
An invention is a machine, tool, or system that someone made, or designed for the first time. An invention may be the creation of something completely new or an improvement of something that someone else has produced. Many important inventions have come from the work of one person; others are created by many people working as a team. We will never know who thought of many of the very early inventions, such as the wheel and the plough.
