Her question was so difficult that I could hardly make any ____ of it at all.　 

The stronger the______ for acquiring language skills is, the more quickly a language beginner will learn. 

Professional and skilled as she is in drama, there are ______ when she can make some funny mistakes while acting in a movie.

_____ the different cultures, values and levels of economic development in China and the West, both sides should respect the diversity of their development paths.

There is no      in trying to persuade him to change his mind, for he never follows the advice of others.