When it          choosing your future career, what kind of things will you take into consideration?

The poor child stood there, and ________ what to do, turned to his father for help.   

Last week a tennis ball hit me on the head, but I tried to _______ the pain, believing that it would go away sooner or later.

Peter ________ be really difficult at times even though he's a nice person in general.

—Have you heard that George quit his job?—Yeah, but I can't________why he did so.