I’ve been writing this report ____for the last two weeks ,but it has to be handed it tomorrow.

Reading the job ad．he wondered whether he was ____ to apply for it．

The new secretary has written a remarkably _____ report only in a few pages but with all the details.

Between 4.5 and 3.8 billion years ago, the earth became so ______ that it was not clear whether the shape would last or not.

Can you tell me the        difference between the words “require” and “request” ? I sometimes get puzzled by their meanings.