Grammar exercises: How to use 划算 (huásuàn) in Mandarin Chinese: to be a bargain 语法:划算、划、算 练习
The example sentences of the article, a few to an exercise, in the order the article shows them. Each exercise takes the point's word out of a sentence for you to fill back in, then gives you the sentence's words to put in order, and an item you miss comes back later in the same sitting.
2 grammar exercises over 18 items.