Question

Choose the correct form of verb-dental disease ____ (are/is/will be) the most common disease in tue world . Tooth brushing ____ (is considered/are considered/may be considered) the best method to remove plaque and proper method of brushing _____

Answer 1

Dental disease is the most common disease in the world.  Tooth brushing is considered the best method to remove plaque and proper method of brushing.