1 . Directions: Fill in each blank with a proper word chosen from the box. Each word can be used only once. Note that there is one word more than you need.

A. moderation       B.commercial       C. present       D. arises       E. existing       F. responded    G. involved            H. available        I. processing       J. accurately   K. closely

Computer programs recognize white men better than black women

Software that recognizes faces has bounded ahead in recent years, aroused by a boom in a form of artificial intelligence called deep learning. Several firms now offer face recognition as a     1     service, via their respective clouds. The ability to recognize in faces such things as an individual’s sex has improved too, and this is also commercially     2    .

The algorithms(算法)     3     have, however, long been suspected of bias. Specifically, they are declared to be better at     4     white faces than those of other people. Until now, that suspicion has been unsupported by evidence. But next week, at Fairness, Accountability and Transparency, a conference in New York, Joy Buolamwini of the Massachusetts Institute of Technology will     5     work which suggests it is true.

Ms Buolamwini and her colleague Timnit Gebru looked at three sex-recognition systems, those of IBM, Microsoft and Facebook. They tested these on a set of 1,270 photographs of parliamentarians(国会议员) from around the world and found that all three classified lighter faces more     6     than darker ones. All also classified males more accurately than females. IBM’s algorithm, for example, got light male faces wrong just 0.3% of the time. That compared with 34.7% of the time for dark female faces. The other two systems had similar gulfs in their performances. Probably, this bias     7     from the sets of data the firms concerned used to train their software. Ms Buolamwini and Ms Gebru could not, however, test this because those data sets are     8     guarded.

IBM has     9     quickly. It said it had retrained its system on a new data set for the past year, and that this had greatly improved its accuracy . When testing the new system on an updated version of the set of politicians Ms Buolamwini and Ms Gebru had used, the firm said it now achieved an error rate of 3.46% on dark-skinned female faces—a tenth of that the two researchers had found using the     10     system. For light-skinned males the error rate also fell, to 0.25%.

2 . Directions: After reading the passage below, fill in the blanks to make the passage coherent and grammatically correct. For the blanks with a given word, fill in each blank with the proper form of the given word; for the other blanks, use one word that best fits each blank.

An Unexpected Adventure

Before Noel Santillan became famous for getting lost in Iceland, he was just another guy from New Jersey looking for adventure.

On a freezing, dark morning, Santillan was driving away from an airport in a rented car toward a hotel in Reykjavík, about 40 minutes away,     1    (arm) with the modern traveller’s two essentials: a dream and, more importantly, a GPS unit, which can direct people to a definite address. He carefully followed the commands of the GPS that came with the car, a calm female voice     2    (direct) him to the destination - a left here, a right there.

But after stopping on a deserted stone road next to a sign for a gas station, Santillan got the feeling that the voice might be steering him wrong. He     3    (drive) for nearly an hour already, yet the estimated time of arrival on the GPS put his arrival time at around 5:20 p.m., eight hours later.     4    (assure) himself, he reentered his destination but got the same result.     5     he sensed that something was wrong, he decided to trust the machine.

The     6    (far) he drove, the fewer cars he saw. The roads became icier. Sleeplessness confused his brain, and his empty stomach became upset. The only stations he could find on the radio were airing strange talk shows in Icelandic. His phone was no help, since it had not been set up for international use. At around 2 p.m., as his tires slid    7     control along a narrow mountain road on the edge of a steep cliff, he knew that the device had failed him.

He       8     (lose) and - despite the insistence of his GPS - nowhere near his hotel. There were no other drivers on the road, and he didn’t know     9     he could do but follow the line on the screen to its mysterious end. “I knew I was going to get somewhere,” he says. “I didn’t know where else to go.”

The directions ended at a small blue house in a tiny town,     10     a pretty blue-eyed blond woman answered his knock. She smiled as he difficultly spoke about his hotel and handed her his reservation.

4 . Some people like drinking coffee, for it has ________ effects.

A．promoting

B．stimulating

C．enhancing

D．encouraging