Test analysis: Pay attention to the key sentence in this test-"Effective work is based on certain interests". This shows the importance of interest in personal work and stimulates people's learning motivation. BCD's statement itself is wrong.

Comments: This kind of questions often appear in exams. Now the test for students is mainly the ability of independent analysis. Students must strengthen the accumulation of knowledge of famous sentences in peacetime, so this kind of questions should attract students' attention.