Mathematics depends on doing some problems, and the key is to learn to deal with problems on the basis of understanding.

Of course, if the invigilator can actively solve problems and find good problems, he will quickly improve his math problem-solving ability.

For example, the loan problem, the area problem and the ticket window problem. ...

Chinese is of course the result of careful calculation and accumulation, and a certain amount of novel reading is necessary, so as to learn idioms, pronunciations and so on systematically. Chinese will not happen overnight.

English depends on practice, and then practice. Listening, grammar and pronunciation need many specific connections.