Question

ook at these important dates in history and
write positive or negative sentences with the
past perfect.
1 4500 BC-invent the wheel
By 4500 BC they had invented the wheel.
2 1400-start to print books
3 1805- make the first battery
4 1895-discover X-rays
5 1900-fly for the first time
6 1910-discover penicillin
7 1932-split the atom

Answer 1

Ответ:

надеюсь помогла....