1.The lions/feed/20 kilos of food a day.
The lions are fed 20 kilos of food a day.
2.Corn/plant/in the middle of spring.
Corn is planted in the middle of spring.
3.I/not allow/to stay up past 10.
I am not allowed to stay up past 10.
4.George/not invite/to last week's dance.
George wasn't invited to the last week's dance.
5.The winners/will announce/very soon.
The winners will be announced very soon.
6.Life/not discover/on Mars.
Life wasn't discovered on Mars.
7.250 people/employ/the company.
250 people are employed by the company.
8.French francs/not use/anymore.
French francs aren't used anymore.