1.(这个计划成功的关键) ___________is good planning.
　　2. The specific use of leisure______(每一人都不同).
　　3. The ship ' s generator broke down and the pumps____________________( 不得不用手工操作 ) instead of mechanically.
　　4. Although punctual himself, the professor was quite used______________( 习惯了学生迟到 ) his lecture.
　　5. I prefer to communicate with my customers ______( 通过写电子邮件而不是打电话).

　　答案
　　1. The key to the success of this project
　　2. from individual to individual.
　　3. had to be operated manually
　　4. to students' being late for
　　5. via E-mail instead of telephone