In the first century AD, Greek engineer Heron of Alexandria ______ the first wind wheel to operate a machine. a) invented

In the first century AD, Greek engineer Heron of Alexandria ______ the first wind wheel to operate a machine. a) invented b) had invented c) has invented d) was inventingПравильный ответ — a) invented, так как в предложении известно точное время, когда было совершено действие (In the first century AD), следственно, нужно употребить глагол в форме Past Simple: In the first century AD, Greek engineer Heron of Alexandria invented the first wind wheel to operate a machine.