The professor devoted all his life ____the treatment of AIDS.A to research B.in researching C.to researching D.at researching
—David, thank you so much for lending me your car this morning. —_____
When _____ to danger and conflict, men tend to increase blood pressure, _____ nervous and anxious.
I wondered if it would be _____ to wish the bribe good luck after the wedding.
_____ about his financial position that he can’t sleep at night.
The stepmother denied _____ to murder the little boy, but there was no _____ the fact that she had always been cruel to him.