staying at a bed-and-breakfast inn is much different from staying at a hotel. usually the cost is much less. staying at an inn is almost like visiting someone’s home. the owners are glad to tell about the areas and the interesting places to visit. many vacationers say that they enjoy the chance to meet local families.
45. americans take a holiday trip _________.
a. all the year round b. for years c. every year d. every other year
46. according to the passage, which of the following is not true?
a. some americans like to stay at bed-and-breakfast homes instead of at hotels.
b. the bed-and-breakfast inns are private homes open to vacationers.
c. the bed-and-breakfast inn owners provide a morning meal for their visitors and a room for the night.
d. the bed-and-breakfast inns have been popular in america for a long time.
47. staying at the bed-and-breakfast inns, _________.
a. the travelers needn’t pay anything
b. the travelers don’t have to pay for the telephone or television
c. the travelers can meet and talk with the local people
d. the owners will show the travelers around the area
most of the flowers in nature are red, orange and yellow. if we have seen a black flower, it’s a chance in million. people have made a census ( 普查 ) to colors of more than four thousand kinds of flowers and discovered that only eight of them are black. as we know, sunlight is formed by seven different colored lights. the wave length of each light is different, so the quantity of heat in each light is also different. flowers, especially their petals ( 花瓣 ) , are easy to be harmed by high temperature. black flowers can take in all the light waves which cause the flowers to dry up in a high temperature. so black flowers can rarely survive sunlight. but red flowers, orange flowers and yellow flowers can protect themselves from sunlight by reflecting the red light, orange light and yellow light, each of which has a large quantity of heat.
48. it is _________ to see a black flower.
a. impossible b. seldom c. common d. no chance
49. the passage tells us that ________________.
a. black flowers are so weak that it is difficult for them to grow up.
b. there is only eight black flowers in nature.
c. sunlight is formed by seven different colored lights, so the wave length of each light is different.
d. black flowers can take in the light of all the wave lengths which make them dry up because of high temperature.