-- The classroom looks like a mess!-- Yes, but who left the waste paper ______ around?
Sadly, ____ I remember was a beautiful lake two years ago is now a smelly wasteland.
One of the advantages with the new tool is that it is users ____. Users can handle it with less effort and more convenience.
Suspecting him of robbing the bank, the Security Police were ___ his phone calls.
--- Are you angry? --- Yes. He should at least answer when ____.
Having longed so much to have a look at the famous star, the fans looked forward anxiously ____ the live concert.