阅读理解 Today is December 15, 2030. Influenced by the launch of the first manned mission to Mars next month, you will most likely get a gift card for a space trip. The interest in trips, 100km above the surface of the Earth, has grown steadily since such a trip began. However, the market has grown much larger this year since the official announcement of the Mars mission. More low-cost spacelines have entered the market and you can now find the price for such a trip is as low as $3,495. It's very reasonable. Space tourism (旅游业;观光业) is one of the markets that have developed fast during the last decade, with the opening of the Starbright Hotel on the moon as well as the low orbital (轨道的) hotels that started accepting guests. However, accommodation (住宿) in space is still expensive for the average household, so the suborbital (亚轨道的) flights with thirty-minute weightlessness during the three-hour flight will for some time be the most popular trip. However, the spacelines might face fierce (激烈的) competition for space elevators (太空升降舱) in the future, like the one that is projected to start construction (建造) within two years. Once it is fully functional (工作的), it willstart to ship cargo (货物) to space. But it will accept passengers as soon as possible to get back the large investment. Even if the elevator (电梯) becomes successful, it will take several years before there are more elevators in the world to get in the competition for space traffic with the spacelines. Those who are looking for a little bit of adventure and have extra money to spend may want to consider a suborbital flight in space. While a suborbital flight may not be the space mission that you have always dreamed of, it will give you the rare opportunity to see what our planet looks like in a high-altitude (高度) flight outside our atmosphere. So before you enjoy a trip by elevator to space, enjoy a suborbital flight first. （1）From Paragraph 1, what will happen in January, 2031? A．A gift card will be taken to Mars.B．Mars will be explored for the first time.C．Man will go to Mars for the first time.D．An affordable space trip will come true.（2）The underlined "average" can most probably be replaced by "__________" in this passage. A．commonB．high-incomeC．low-costD．low-income（3）What is the space elevator's purpose in accepting passengers as soon as possible? A．To ship cargo to space.B．To get in the competition for spacelines.C．To start the construction of more space elevators.D．To get back the large investment.（4）Which of the following is NOT true according to the passage? A．Space tourism has developed fast during the last ten years.B．A suborbital flight may be the space mission that you have dreamed of.C．The suborbital flights will be the most popular trip for some time.D．Even though the elevator becomes successful, we will still wait for a few years to see more elevators come out.（5）We can know from the passage that _________. A．the low orbital hotels have opened since a space trip beganB．within two years, space elevators will begin to ship cargo and people to spaceC．during the suborbital flights, you will experience 30 minutes of weightlessnessD．if you want to meet your curiosity, you may try a suborbital flight