Grammar exercise 1 of 1 语法练习1
Use 终、于、最、后 as “The difference between 终于 (zhōngyú) and 最后 (zuìhòu) in Mandarin Chinese: 'finally' vs 'the last'” explains it, through 7 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.
The difference between 终于 (zhōngyú) and 最后 (zuìhòu) in Mandarin Chinese: 'finally' vs 'the last'
7 items. Each one you miss comes back later in the same sitting.