在小学英语学习中，四年级是一个重要的阶段，学生开始接触更多的词汇和语法知识。为了帮助同学们更好地掌握所学内容，我们特意准备了这套人教版四年级上册的英语练习题及其详细答案。

一、单项选择题

1. What's this? It's _______ elephant.

A. a B. an C. the

正确答案：B. an

解析：elephant是以元音音素开头的单词，因此前面要用an。

2. I have _______ book and _______ pen.

A. a; a B. an; a C. a; an

正确答案：A. a; a

解析：book和pen都是以辅音音素开头的单词，所以前面都用a。

二、完形填空

My name is Tom. I am from _______ (1). I like _______ (2) very much. I often play football with my friends after school.

(1) A. China B. America C. England

(2) A. football B. basketball C. volleyball

正确答案：(1) B. America (2) A. football

解析：根据句子中的信息，Tom喜欢踢足球，所以第二个空应该填football。而Tom来自美国，所以第一个空应为America。

三、阅读理解

My Family

This is my family. There are five people in my family. My father is a doctor. He works in a hospital. My mother is a teacher. She teaches English at school. I have two sisters. They are students. We all love each other.

Questions:

1. How many people are there in Tom's family?

A. Four B. Five C. Six

Correct Answer: B. Five

解析：文中明确提到有五个人在Tom的家庭里。

2. What does Tom's father do?

A. He is a teacher. B. He is a doctor. C. He is a student.

Correct Answer: B. He is a doctor.

解析：文章中指出Tom的父亲是一名医生。

通过这些练习题，希望同学们能够巩固所学的知识点，并且提高自己的英语水平。如果有任何疑问，请及时向老师或家长请教。记住，坚持每天练习是提高英语能力的关键！