根据短文内容，请将单词填写在题号对应的横线上。
Taking a taxi in a certain Eastern European country can be a shocking experience. ____ is said that some taxi drivers have metal wires stuck into the passenger seats. And ____ a button is pushed, the seat will give you ____ electric shock. These taxi drivers don't do this ____ fun. They do it to tourists ____ argue about the ridiculous(可笑的，荒谬的) fares they charge. Some drivers charge as much ____ ten times the legal fare.
They have a secret switch which makes the meters run faster. If the tourists refuse to pay, ____ are really in for a shock.
In one case, a German woman had no ____ (choose) but to pay $120 for a $ 20 ride from the airport. She said that she was "really taken for a ride," but what could she do? Besides the electric shock, she ____ (threaten) with physical violence. She has only one piece of advice for tourists, “Take the bus ____ stay at home.”
中自变量x的取值范围是