The Chinese government has overcome problems of population and economy to ________ its “nine years of compulsory education”.
Mary, I_____ John of his promise to help you.
I got this bicycle for______:My friend gave it to me when she bought a new one.
As he reached _____front door, Jack saw ______strange sight.
I have bought two ball pens ,______ writes well.
——I let my secretary call you several times. Do you know that? ——I _____in a meeting. I’m sorry.