.The conference aims to develop business and let people think about ______ they can have a positive influence on the planet.
—Why didn’t Tom ask for help then?—You know, at such a midnight, there was no one ______.
That was the first time I ______ there and I was impressed by the friendly people very much.
Smoking too much may ______ lung cancer and cause other diseases.
Mary felt sad over the loss of photos she had shot in Australia, ______ that was a memory she especially treasured.
With the guide ______ the way, we finally got to the village which we were looking for.