[典例剖析] 选词填空。
1. James
(began/started) the car and drove away.
2. She began
(to run/running) every morning to stay healthy.
点拨 第1小题，由后半句中的 drove away 可知，前半句想表达的是“詹姆士启动了汽车”，start 更常用于表示“启动机器、引擎、车辆”等具体动作。故填 started。第2小题，begin to do sth 和 begin doing sth 都表示“开始做某事”，但前者更强调动作的开始瞬间，后者更强调活动的持续性或习惯的形成。由句中的 every morning 可知，她开始跑步是形成了重复性的习惯。故填 running。
答案：1. started 2. running
解析：
1. 第一小题：begin和start都有“开始”的含义，但start可以用来表示启动车辆、机器这类具体设备，begin没有该用法，句中要表达“詹姆斯启动汽车后开走了”，后半句的drove提示句子为一般过去时，因此选started。
2. 第二小题：begin to do sth和begin doing sth都表示“开始做某事”，前者侧重动作开始的瞬间，后者侧重动作的持续性、长期习惯的养成，句中every morning说明跑步是长期坚持的日常习惯，因此选running。
[反馈练习] 根据所给提示填空，完成对话。
Leo: Hi, Emma! I heard you love science now. ______ (连词成句:did, in, show, begin, science, you, when, to, interest)?
Emma: I think it all s
when I was in Grade 3.
Leo: Wow! What started your interest?
Emma: One day, our teacher did a Rainbow Milk Experiment. When I saw the "rainbow", my curiosity
(开始增长). After that, I
(开始阅读科学书籍) for kids.
Leo: Cool! So your interest b
with a rainbow?
Emma: Yes! And then I s
watching science videos online. Several months later, I
(开始做) my own experiments.
答案：When did you begin to show interest in science, started, began to grow, began to read science books, began, started, started doing
