根据短文理解，从A、B、C、D四个选项中选择最佳答案填空。

    My name is Linda. Amy is my best friend. She 1 long straight black hair and two big black eyes. 2 nose is very small. She is beautiful.

    She is 3, too. Amy likes animals, so she 4 helps her grandparents take care of (照顾) their cat and dog. She is also a 5 student in my class. She studies very hard 6 she often helps other students. After school, we often play together. We 7 swimming very much, so summer is our favorite season.

    She is not the only 8 in her family. She has a sister of only three years old. Her name is Lucy. Lucy is a cute girl. She 9 me sister the first time. When we go to the park, she wants to go to the 10, too. When we read at home, she wants to read, too. How funny!

下列说法正确的是（  ）

如果你爸爸今天要到南非出差（南半球），你将会建议带

已知$\left\{a_n\right\}$为等比数列，$S_n$是它的前n项和．若$a_2{a}_3=2a_1$，且$a_4$与$2a_7$的等差中项为$\frac{5}{4}$，则$S_5$=（）