听力原文： The word 'motel' means motorist hotel and is used chiefly by people traveling by car. Parking space is always available. Motels are usually located outside the center of town near major roads and are less expensive than hotels. Rates in motels are about $10 to $15 per person a day for a room and bath. Motels in and near large cities tend to be more expensive than this, in smaller towns the prices may be lower. Because motels are often located outside the center of the town, it will probably be inconvenient to stay in a motel unless you have a car or unless the motel is located near public bus or train lines. (29) Although reservations in advance are usually required in motels in busy areas, this is not always the case in less crowded parts of the country. Because of their convenience and economical prices, it is easy to understand why they are so popular with Americans. During the early part of this century, most cities and small towns had a great number of 'guest houses'. These were large private homes with rooms that could be rented to visiting travelers. (30) Guest houses were warm and friendly places where you often could have a home-cooked meal as well as a clean room and bath. Today, unfortunately, few guest houses remain. They have been replaced by motels, (31) which offer the traveler modern conveniences such as television in the rooms and frequently the use of a swimming pool. 29. What do people need to do to live in the motels in busy areas? 30.Which is the characteristic of the guest houses? 31.Why don't the 'guest houses' exist today? (30)