When they heard the bad news, they all looked＿＿＿＿at the master and felt quite＿＿＿＿＿. 

When there's doubt the examiner's decision is _____.

At the end of the year 2010, some species of birds ddn’t survive the _____ winter in some European countries.

Medicine should be placed where it is not ______ to children.

Although he is old, he’s very          . However, when he was young, he was very lazy.