Created the first exercise of the listening demo

src/interfaces/exam.ts

@@ -1,5 +1,3 @@
-export type Type = "fillBlanks" | "matchingSentences";
-
 export interface ReadingExam {
 	text: {
 		title: string;
@@ -8,7 +6,17 @@ export interface ReadingExam {
 	exercises: Exercise[];
 }
 
-type Exercise = FillBlanksExercise | MatchSentencesExercise;
+export interface ListeningExam {
+	audio: {
+		title: string;
+		source: string;
+		transcript: string;
+		repeatableTimes: number; // *The amount of times the user is allowed to repeat the audio, 0 for unlimited
+	};
+	exercises: Exercise[];
+}
+
+export type Exercise = FillBlanksExercise | MatchSentencesExercise | MultipleChoiceExercise;
 
 export interface FillBlanksExercise {
 	prompt: string; // *EXAMPLE: "Complete the summary below. Click a blank to select the corresponding word for it."
@@ -23,7 +31,7 @@ export interface FillBlanksExercise {
 }
 
 export interface MatchSentencesExercise {
-	type: string;
+	type: "matchSentences";
 	prompt: string;
 	sentences: {
 		id: string;
@@ -37,3 +45,21 @@ export interface MatchSentencesExercise {
 		sentence: string;
 	}[];
 }
+
+export interface MultipleChoiceExercise {
+	type: "multipleChoice";
+	prompt: string; // *EXAMPLE: "Select the appropriate option."
+	questions: MultipleChoiceQuestion[];
+}
+
+export interface MultipleChoiceQuestion {
+	variant: "image" | "text";
+	id: string; // *EXAMPLE: "1"
+	prompt: string; // *EXAMPLE: "What does her briefcase look like?"
+	solution: string; // *EXAMPLE: "A"
+	options: {
+		id: string; // *EXAMPLE: "A"
+		src?: string; // *EXAMPLE: "https://i.imgur.com/rEbrSqA.png" (only used if the variant is "image")
+		text?: string; // *EXAMPLE: "wallet, pens and novel" (only used if the variant is "text")
+	}[];
+}