Grammar exercise 1 of 1 语法练习1
Use 所 as “Chinese grammar 所 (suǒ) structural particle” explains it, through 8 items over 7 of its example sentences: fill the gap where the word was taken out, and put the words of each sentence back in order.
Chinese grammar 所 (suǒ) structural particle
8 items. Each one you miss comes back later in the same sitting.