单项选择题

The usual image of studying is of someone peering into a book, hoping to learn something. Study is a dull word for 1 fascinating ways to 2 the world of learning. A 5-year-old child must study to learn the alphabet. A team member in the National Football League must study the plays 3 by the coaches. All the practice sessions a pianist endures are 4 forms of study.
The success of every learning experience in school or in a career depends on some 5 of studying, and not all studying is done with books. The biologist must inspect nature firsthand. The airline 6 must learn about wind and other weather 7 .Soldiers must be trained to 8 under the most difficult conditions. 9 , for most persons the reading of useful books is a 10 step to learning. The study that underpins learning is a lifelong pursuit.
Although memory is vital to all learning, study is not 11 of memory only. Arithmetic problems, for instance, are mainly practice in using numbers in ways already learned. Reading, spelling, and writing are skill subjects too and require practice. By repeated effort, 12 in these subjects is increased 13 typing and driving are. They are tool subjects, or stepping stones, 14 the learner increases knowledge and expands it into other areas. The sciences, language arts, and social studies are skill subjects only in part. They also give the learner practice in understanding the 15 between ideas and events, or cause and effect.
Some facts and skills are learned by taking part in activities. Some are learned by 16 what others do or by reading about 17 has happened. In every 18 a background of information from experience or study can help speed the learning process.
The textbook is the most common 19 for school use. It establishes the 20 by which learning proceeds. It frequently includes practice problems and activities that allow the learner to use what has been learned.

A. watching
B. seeing
C. looking
D. attending