Приобразовать в сравнительную степень
Friendly
Exciting
Comfortable
Modern
Expensive

FriendlierMore excitingMore comfortableMore modern/modernerMore expensive

1) Friendly.Возможно два варианта - friendlier, or more friendly.2) Exciting - more exciting3) Comfortable - more comfortable4) ModernВозможно два варианта - moderner, or more modern5) Expensive - more expensive