(2012浙江卷) According to scientists, our mental abilities begin to______ from the age of 27 after reaching the highest level at 22.
After that, he knew he could _____ any difficulty by doing what be could to the best of his ability.
I’m calling to ask about the position ________ in yesterday’s China Daily.
Who can think of a situation __________ this idiom can be used?
I asked him how much ________________.
As we all know,parents are concerned ________their children’s study,because it is concerned ________their future.