It is already well understood___________ causes the global warming.

I hope_______ my birthday party next Saturday.

(2013·银川高三一模)—Where is the post office?—It’s just over there, at the end of the street. You ________ not miss it.

The companies are working together to create _____they hope will be the best means of transport in the 21st century.

With drink and food ____, the prisoner had to walk out of the cave where he was hiding.