The machines in this workshop are not regulated () but are jointly controlled by a central computer system.

单项选择题I've attached my contact information in the recommendation letter () you have further questions.

A. for good
B. in order
C. for fear
D. in case

单项选择题Mobile phones are proved to () with flight instruments and have a negative effect on flight safety.

A. interfere
B. disturb
C. interrupt
D. trouble