You have to keep on learning if you want to keep __________with the development of modern science and technology.
Although the first part is easy the rest ____.
. Rain and freezing temperatures ____ to make snow.
. The express No.12_____ at two pm.
Our city has changed a lot; who can tell what it will be like in ___ ten years?
She fell and hit her head, but she ___ to be all right now.