According to the passage, which of the following is an advantage of mixed-ability teaching? A. Formal class teaching is the important way to give the pupils essential skills such as those to

Formal class teaching is the important way to give the pupils essential skills such as those to be used in the library.

A pupil can be at the bottom of a class.

Pupils can be hindered from an all-round development.

Pupils as individuals always have the opportunities to work on their own.