B. can
Feedback We often use ‘can’ to talk about someone’s skill or general abilities. This is something that once you have learnt you can do any time you want, like being able to read or swim or drive a car, for example: I can singsongs in English.; I can ride a horse.; She can speak several languages. If we paraphrase the test sentence,it will sound like: ‘Mark is able to communicate in 3 languages.’ Therefore, we are to choose ANSWER 2.