题目

1.我们学校一年举行一次运动会
Our school ____________________________.
2.我们必须采取行动阻止人们砍伐森林.
We must ___________________people _______________forests.
3.你能告诉我们如何确定它们在数量上的变化吗?
Can you tell us ____________________their numbers?

提问时间：2020-12-17

答案

1.hold the sports meeting once a year.
2.take actions to stop, from cutting down
3.how to make sure the change of