A．digB．drawC．pullD．extractThe dentist has decided to ta……

单项选择题Holonyak’s colleagues thought he would fail in his research on LEDs at the time when he started it.

单项选择题The Lemelson-M1T Prize has a history of over 100 years.

单项选择题Edith Flanigen is the only co-inventor of LEDs.

单项选择题Holonyak said that you should not do anything you are not interested in.

单项选择题Holonyak believed that LEDs would become very popular in the future.