英语句型转换 1.They count swans once a year.（改为同义句） They _____ ___

英语句型转换
1.They count swans once a year.（改为同义句）
They _____ _____ _____ _____ every year.
2.The rovernment should protect the endangerde animals.（改为同义句）
The rovernment should protect the animals _____ _____.
3.There won't be any elephants if we don't help them.（改为同义句）
There will _____ _____ elephants if we don't help them.

1.count up swans' number / count swans' number up / add up swans' number / add swans' number up / worked out swans' sum / figure out swans' sum
【注】：count up the number of sth.=count sth.给…计数；worked out / figure out sth.' sum 计算…的总数
2.in danger
【注】：endangered =in danger,endangered作前置定语,in danger作后置定语
3.be no / exist no
【注】：There is =There exists,There are=There exist.
语法上都是对的,请根据与课文的相关度选择最佳项.