Grammar exercise 3 of 3 语法练习3
Use 久、长 as “How to use 长 (cháng) and 久 (jiǔ) correctly in Chinese grammar” explains it, through 10 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.
How to use 长 (cháng) and 久 (jiǔ) correctly in Chinese grammar
10 items. Each one you miss comes back later in the same sitting.