根据以下资料，回答9~12题。

The earliest immigrants to North America found Indians already living there．The Indians numbered about 500,000 at that time．Their society was a primitive society, but they lived peacefully and welcomed the white strangers to the land．However, these early immigrants from Europe didn't want to share the land with the natives．They killed off many of the Indians, seized their land or pushed them off to lands farther away．Today the Indians, not more than half a million, live in poverty and misery on the land on which they were once masters.

The earliest immigrants were the Spanish, who settled in the southern part of what is now the US．The next large group were the English, after the English came the French, Dutch, Irish, Germans, and other nationality groups, mostly European.

你(LiYuan)和几个朋友约定明天在人民公园野餐。你们的朋友Peter也应邀参加。 你给他写封信，内容包括：

(1)说明野餐目的。

(2)说明路线。

(3)说明日期、时间。

根据以下资料，回答1~5题。

请在第_______处填上正确答案。

请在第_______处填上正确答案。

A Japanese therapist explained that __．

What is the writer's attitude toward the experiment? He is __.

The use of blue lights to reduce suicides __.

根据以下资料，回答17~20题。

Train companies in Tokyo are taking action to reduce the number of people jumping in front of trains．They are fitting blue lights on station platforms to try and create a more calming atmosphere．The East Japan Railway Company has invested almost $170,000 to install the lights in all of the 29 stations on the capital's busy Yamanote Line．There has been an alarming rise in the number of people committing suicide at train stations．A total of 68 people threw themselves under trains in the year up to March．This compares with 42 suicides in the same period a year earlier．In 2008, Japan had nearly 2,000 suicides by jumping in front of a train; around six percent of all suicides nationwide．Suicides have risen sharply in the past decade due to poor economic conditions.

No one knows if the blue lights will work．There is no evidence to show that blue light reduces suicidal feelings． Keihan Railway spokesman Osamu Okawa stated: "We thought we had to do something to save lives．We know there is no scientific proof that blue lights deter suicides, but if blue has a soothing effect on the mind, we want to try it to save lives." The Associated Press news agency reports on a Japanese therapist called Mizuki 　　　Takahashi．She explained her reasons why the blue lights might be a good idea: "We associate the color with the sky and the sea．It has a calming effect on agitated people, or people obsessed with one particular thing, which in this case is committing suicide," she said．Other companies are watching this experiment with interest.

Why blue lights are installed in many train stations?

Many animals may be trained to do simple jobs if they know __.

The trainer usually gives the animal a piece of candy or fruit __.

Which of the following is not true?