Grammar exercise 5 of 5 语法练习5
Use 吗、在、是、很、有、要、没、和 as “10 basic Chinese grammar points for beginners” explains it, through 17 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.
10 basic Chinese grammar points for beginners
17 items. Each one you miss comes back later in the same sitting.