5. заполните пропуски данными в скобках существительными hundred, thousand, million, billion в единственном числе (с артиклем или без артикля) или во множественном числе.

1 over the past two years, (million) immigrants found work, many illegally.
2 (thousand) of bees have been stolen from a british university.
3 (hundred) years after the constitution was signed, free-enterprise economics had produced doubtful results.
4 state prosecutors investigate more (thousand) cases of stolen babies in spain.
5 according to the estimate, the world population has exceeded the number of (billion) people
6 officials issued public warnings (hundred) of sharks were spotted in the waters.
7 roman abramovich threw a party costing (million) pounds.
8 (million) of people in west africa must be protected from a serious food crisis.
9 it has been found that walking (thousand) steps a day will help you drop undesired pounds.