Rewrite the parts in italics of the following sentences with the proper words of conversion, making changes where necessary.
查看答案
When sea level rises, it can increase the height of storm waves, making more areas vulnerable (易遭受) to storm damage.
The letter must have sat in the drawer for such a long time that it has become yellow.
Bob lives not far from the school he attends. So he goes to school by bicycle.
When the color turns green it means they’re doing well; when the color turns red it means they might fail.