Ms Black is considered a ________lady by her neighbors for she often helps the poor old man next door.
Since Tom ___downloaded a virus into his computer, he can not open the file now.
Seeing that the drowning child was struggling in the icy water, the soldier dived into the river without hesitation, ___ his own safety.
If you just spend your time___ gains and losses, maybe you'll get nothing in the end.
According to the newly-made traffic regulation, whoever drives through red lightbe fined at least 200 dollars.
He is very popular among his students as he always tries to make them ____ in his lectures.