19．A.treat

　　B．challenge

　　C．delight

　　D．value

　　解析：选C。A项意为“治疗，招待”；B项意为“挑战”；C项意为“使高兴，使开心”；D项意为“珍惜”。作者将自己的孩子比作花儿，自己的孩子使自己开心就像祖母的花儿使她开心一样。故答案选C。

　　20．A.tend

　　B．miss

　　C．promote

　　D．influence

　　解析：选A。A项意为“照顾，管理，护理”；B项意为“错过，想念”；C项意为“促进”；D项意为“影响”。根据语境“water them with love”可知，作者全心全意地照顾着孩子们。故答案选A。

　　.语法填空

　　[2016·山东省日照市校际联合检测(二)]Most people nowadays are so busy with their lives that they do not have time to enjoy a healthy and

　　1.__________ (balance) diet. For most individuals，as

　　2.____________

　　result of eating foods rich in fats and sugar several years，they choose to go on a diet but do not succeed at the end. Be sure to be with a strong

　　3.____________ (aware) that you are

　　4.__________

　　you eat! Therefore，maintaining a healthy diet not only

　　5.____________ (provide) your body with energy but also has numerous health benefits. One is that you will keep a healthy weight and is also the easiest and most

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