To make members of a team perform better, the trainer first of all has to know their ______ and weaknesses． 

The little boy was the only one who ________ the earthquake in this village, and the government sent him to a city school after that.

Whether enough blood is donated could be a(an) ________ of life and death for the accident victims.

. It isn’t so much whether he works hard; the question is whether he works _____.

We were supposed to move into our new classroom building at the beginning of this month，but things didn’t ________ as planned.