[单项选择]A Hidden passengers traveling in ships, trains, or even cars can be a terrible trouble—especially when they are insects. As for this, there is a great21between human beings and insects. The former 22every possible effort to avoid being discovered, while the latter quickly draw attention to themselves. We can only show mercy to the unfortunate man who had to stop his car soon after23from a country village to drive to London. Hearing a strange noise from the24of the car he naturally got out to25the wheels carefully, but he found nothing wrong, so he continued his way. Again the noise began immediately. Quickly26his head, the man saw what appeared to be a great number of bees following the car. When he stopped at a village further on, he was told that a queen bee must be hidden in his car as there were thousands of bees27. The man drove away as quickly as possible and arrived safely in London. Suddenly he saw his car was28with bees. The poor driver was29that the best way shoul
A. hiding
B. turning
C. shaking
D. raising

[单项选择]A Hidden passengers traveling in ships, trains, or even cars can be a terrible trouble—especially when they are insects. As for this, there is a great21between human beings and insects. The former 22every possible effort to avoid being discovered, while the latter quickly draw attention to themselves. We can only show mercy to the unfortunate man who had to stop his car soon after23from a country village to drive to London. Hearing a strange noise from the24of the car he naturally got out to25the wheels carefully, but he found nothing wrong, so he continued his way. Again the noise began immediately. Quickly26his head, the man saw what appeared to be a great number of bees following the car. When he stopped at a village further on, he was told that a queen bee must be hidden in his car as there were thousands of bees27. The man drove away as quickly as possible and arrived safely in London. Suddenly he saw his car was28with bees. The poor driver was29that the best way shoul
A. connection
B. difference
C. communication
D. similarity

[简答题]To protect you and your fellow passengers, the Transportation Security Administration (TSA) is required by law to inspect all your baggage. As part of this process, some bags are opened and inspected. Your bag was among those selected for inspection. During the inspection, your bag and its contents may have been searched for items not allowed by law. After the inspection, the contents were returned to your bag. Nothing was lost.

[单项选择]
Clipper ships are small, lightweight vessels with three masts that boast a massive array of sails which allow them to move extremely quickly. The name "clipper" is thought to come from the fact that the bow of such a ship seems to cut through water as it advances, something also true of older types of ship. Certainly, people were using the expression "to go at a good clip" to mean "to travel quickly" long before the advent of the clipper ship, so the explanation seems to make sense. In fact, it is difficult to date the emergence of the first true clipper, since the word was liberally applied to several speedy ships from the early 19th century that did not possess the technical specifications to qualify as clippers under the later definition of the term. What is known, however, is that by the 1840s, several shipyards were engaged in building vessels that were recognizably clipper ships.
The great advantage of the clipper
A. To show that clippers were mostly used by those traveling to America.
B. To try to convince people that clippers worsened people’s greed for gold.
C. To give an example of a situation that made clippers valuable.
D. To demonstrate why clippers eventually fell out of favor with the publi