Teachers should allow their students to study ________ from the start, and it is bound to result in their ability to deal with problems on their own.
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.
Karen was always thinking we were talking about his poor past. Every time we were chatting together, he would be all _____.