Grammar exercise 1 of 2 语法练习1
Use 的 as “Key Chinese grammar structure: modifier + de + noun (的)” explains it, through 10 items over 5 of its example sentences: fill the gap where the word was taken out, and put the words of each sentence back in order.
Key Chinese grammar structure: modifier + de + noun (的)
10 items. Each one you miss comes back later in the same sitting.