укажіть формулу кислотного оксиду
а)BaO
b)MgO
v)Li2O
g)SiO2​

Complete the sentences. Use the Past Simple.

She .............................. (begin) to clean the kitchen.
It ................................. (start) to snow.
The holidays ............................ (begin) on Wednesday.
The lesson ................................ (begin) five minutes ago.
He ................................... (become) a writer.
Something ............................... (fall) from the tree.
A black bird ............................... ( fly) over our heads.
Mr Smith .................................. (fly) to Amsterdam.
He .................................... (decide) to take pert in the competition.
He ................................... (spend) a week in the country.