// The generateSentence(desc, arr) takes two parameterer: a description and an array.
// It should return a string based upon the description and array.
// Example 1: if you pass in "largest countries",and ["China", "India", "USA"],
// it should return the string: "The 3 largest countries are China, India, USA"
// Example 2:If you pass in "best fruits" and ["Apples", "Bananas"], it should return:
// "The 2 best fruits are Apples, Bananas"
// Use both a for loop and a template string to solve the challenge
function generateSentence(desc, arr) {
}