A.1.sings. 2.river. 3.percent. 4.watermelon
B.1. subject: I . verb: have . object: a math class . adverb of time: on Wednesday .
2. subject: Ali . verb: ate . object: two apples . adverb of place: at school .
C.1. century .2. mother tongue .3. valuable .4. fluently .5. experience
