What is the difficulty confronting researchers of facial-recognition machines?

A. No computer is yet able to handle huge datasets of human faces.
B. There do not exist public databases with sufficient face samples.
C. There are no appropriate algorithms to process the face samples.
D. They have trouble converting face datasets into the right format.

Section ADirections:In this section, there is a passage with ten blanks. You are required to select one word for each blank from a list of choices given in a word bank following the passage. Read the passage through carefully before making your choices. Each choice in the bank is identified by a letter. Please mark the corresponding letter for each item onAnswer Sheet 2with a singleline through the centre. You may not use any of the words in the bank more than once．Just because they can’t sing opera or ride a bicycle doesn’t mean that animals don’t have culture. There’s no better example of this than killer whales. As one of the most __1__ predators（食肉动物），killer whales may not fit the __2__ of a cultured creature. However, these beasts of the sea do display a vast range of highly __3__ behaviors that appear to be driving their genetic development.The word “culture”comes from the Latin “colere,” which __4__ means “to cultivate.” In other words, it refers to anything that is __5__ or learnt, rather than instinctiveor natural. Among human populations, culture not only affects the way we live,but also writes itself into our genes, affecting who we are. For instance,having spent many generations hunting the fat marine mammals of the Arctic, the Eskimos of Greenland have developed certain genetic __6__ that help them digest and utilize this fat-rich diet, thereby allowing them to __7__ in their cold climate.Like humans,killer whales have colonized a range of different __8__ across the globe,occupying every ocean basin on the planet, with an empire that __9__ from poleto pole. As such, different populations of killer whales have had to learn different hunting techniques in order to gain the upper hand over their local prey（猎物）. This, in turn, has a major effect on theirdiet, leading scientists to __10__ that the ability to learn population-specific hunting methods could be driving the animals’ genetic development.

ABC Travel Agency organised a 10-day tour for us to many famous places ofinterest in China in October last year. They arranged for internal travel by11______, booked hotels and various guided activities. But we arranged our own12______to and from China and extensions to the tour to Hong Kong and SingaporeABC Travel Agency was good value for money when 13______other travelagencies. It was about 40% less than I was quoted by well-known UK travelcompanies for the same itinerary. I would have no hesitation recommending it. ItsGuides were14_____and generally knowledgeable. Most of them spoke good English.Some even went beyond the agreed itinerary and arranged15_____activities for us.

Conversation 1

An apartment of C two-bedrooms.
B. An apartment with a good view.
C. An apartment on the ground floor.
D. An apartment with central heating.

Conversation 1

A. Near a subway station.
B. In the downtown.
C. Near a hotel.
D. In the suburbs.

Conversation 2

A. To get a higher salary.
B. To improve his skills.
C. To work fewer hours.
D. To have better opportunities.

Conversation 2

A) For two years.
B) For three years .
C) For five years.
D) For six years.

Conversation 2

A) A professor.
B) Amanager.
C) A designer.
D) An engineer.

Now listen to the conversations

A. She had a traffic accident.
B. She drove too fast.
C. She ran the red light.
D. She drove drunk.

Conversation 2

A. IT engineer.
B. Sales manager.
Computer programmer.
D. Office secretary.