Réponse :

Bonjour,

A. Gifted people are used to scoring best in every competition.

( to be used to + gerund )

B. Some Moroccan youth associations recommend the government to build an institute for talented students.

( recommend + gerund  BUT :  recommend someone + infinitive with « to » )

C. The best student in the Academy was curious about going

( about + gerund )

D. Students prefer learning English in multimedia classrooms

( prefer + gerund  )