Read the following passage and mark letter A, B, C, or D to indicate the correct word that best completes each blank.

Good communication, ___(1)___ is the key to being successful, is satisfied in many situations: work, personal, social. At work, communication skills are most commonly shown in your ___(2)___ to use and understand language, whether spoken or on paper. You need a good command of language to get your ideas, opinions and feelings across clearly. ___(3)___ carefully is an important communication skill, as is the ability and confidence to ask questions when you need to understand something or get information from someone. Competence ___(4)___ a language except your mother tongue also ___(5)___ as a communication skill.