_____ to sunlight for too much time will do harm to one's skin.
| A．Exposed | B．Having exposed | C．Being exposed | D．After being exposed |
Does ______ matter if he can’t finish the job on time?
| A．this | B．that | C．he | D．it |
I don’t think ____ possible to master a foreign language without much memory work.
| A．this | B．that | C．its | D．it |
Is ____ necessary to complete the design before National Day?
| A．this | B．that | C．it | D．he |
I hate _______ when young people speak to the elderly in a rude way.
| A．this | B．that | C．it | D．one |
—How long are you staying there?
—_________depends.
| A．It | B．Anything | C．This | D．Everything |