Why do you look so disappointed？- My cell can’t work. And I wonder how I can ___________ it.

Physics _______ an easy subject for me when I wasyoung. I usually got high marks then.

Selecting a mobile phone for personal use is no easy task because technology __________ so rapidly

It was an ________ situation, but Mr. Smith carried it off well. [ ]

People who are ______ drugs can’t go without them for a few hours , can they ?