.I wonder how he could __________ not handing in his maths exercises yesterday, for his maths teacher is always strict with his students.
While there are some differences in the education systems in many countries in the world, education is __________.
We should know that we can only reach the top if we are ready to _________ and learn from failure.
In order to improve your English, you’d better ____________ the important points in your notebook in class.
While intelligent people can often ______ the complex, a fool is more likely to make the simple more difficult.
We have made up our minds that we’ll go to Wales for our summer vacation, but we still have not ___________________ when we’re going.