True and false. It's true many churches have prevented people from throwing rice, but this is more likely because the rice can become slick (光滑的) on a road or street. There's nothing about rice that will hurt birds. Rice is an important part of many birds' food.

　　Chocolate is poisonous to dogs.

　　True. Chocolate has theobromine (可可碱), which can make your dog sick. So, if you don't want to put your dog's life at risk, don't feed it with chocolate.

　　The number of people visiting the hospital goes way up during a full moon.

　　False. According to researchers, there is no evidence that more people visit the hospital during a full moon, though more people do seem to get caught by the police during that time. The idea that the moon influences behavior has been studied for thousands of years - even the word "lunacy"， which means crazy behavior, is based on the word "luna" or "moon"．

语篇解读：本文是说明文。文章对一些说法进行了真伪辨别。

　　9．In doctors' opinion, a grass­eating dog or cat ________.

　　A．shows animals also have stomach problems

　　B．behaves like that for personal reasons

　　C．shows animals enjoy tasty food

　　D．is a sign of rain

　　解析：选B　推理判断题。根据第一部分的"Doctors think dogs and cats eat grass to help make their stomach better or maybe just because they like the taste of it."可知，猫狗吃草纯属自身的原因。

　　10．The underlined word "poisonous" in the text can best be replaced by "________"．

　　A．dangerous B．delicious

　　C．similar D．useful

　　解析：选A　词义猜测题。根据该部分的"if you don't want to put your dog's life at risk, don't feed it with chocolate"可知，给狗喂食巧克力可能导致它们有生命危险。

　　11．What's the main purpose of the text?

　　A．To give advice on health.

　　B．To report the latest discoveries in science.

　　C．To provide information about certain stories.

　　D．To test people on their knowledge of animals.

解析：选C　写作意图题。通读全文可知，本文是一篇科普性文章，作者旨在向我们辨别一些说法的真伪。故选C项。