Grammar exercise 1 of 3 语法练习1
Use 久、长 as “How to use 长 (cháng) and 久 (jiǔ) correctly in Chinese grammar” explains it, through 13 items over 8 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
13 items. Each one you miss comes back later in the same sitting.