AIDS control and prevention is a ___ to China as well as the whole world.
It is reported that by careful questioning the police managed to _________ the information they were looking for.
The team has worked hard and its efforts have been _______with success.
Have we met each other before? I’m afraid your name ________ me.
If he works hard at his lesson, I guess he can _______the final exams.
He was watching her doing it with a ________ look on her face, as if to say that she would not change her mind.