---Do you think people can live on the moon one day?---May be. However, it may take ________ years to make it.
The number of the wild animals will become if we don’t take any actions to protect them.
Look at our school. It is becoming .
In order more about Chinese, he reads a lot of books about Chinese history and culture.
This morning Timmy was very hungry but he had _______ .
They waited and waited, and_____ he came back.