Section IUse of English Directions：Read the following text. Choose the best word（s） for each numbered blank and mark A， B， C or D on ANSWER SHEET 1. （10 points）
Research on animal intelligence always makes me wonder just how smart humans are. 1the fruit-fly experiments described in Carl Zimmer's piece in the Science Times on Tuesday. Fruit flies who were taught to be smarter than the average fruit fly2 to live shorter lives. This suggests that3bulbs burn longer， that there is an4in not being too terrifically bright. Intelligence， it5out， is a high-priced option. It takes more upkeep， burns more fuel and is slow6the starting line because it depends on learning - a gradual7 - instead of instinct. Plenty of other species are able to learn， and one of the things they've apparently learned is when to8。
Is there an adaptive value to9intelligence？ That's the question behind this new research. I like it. Instead of casting a wistful glance10at all the species we've left in the dust I.Q.-wise， it implicitly asks what the real11of our own intelligence might be. This is12the mind of every animal I've ever met. Research on animal intelligence also makes me wonder what experiments animals would13on humans if they had the chance. Every cat with an owner，14 ， is running a small-scale study in operant conditioning. we believe that15animals ran the labs， they would test us to16the limits of our patience， our faithfulness， our memory for terrain. They would try to decide what intelligence in humans is really17， not merely how much of it there is.18， they would hope to study a19question： Are humans actually aware of the world they live in？20the results are inconclusive.
1.[A] Suppose[B] Consider[C] Observe[D] Imagine
2.[A] tended[B] feared[C] happened[D] threatened
3.[A] thinner[B] stabler[C] lighter[D] dimmer
4.[A] tendency[B] advantage[C] inclination[D] priority
5.[A] insists on[B] sums up[C] turns out[D] puts forward
6.[A] off[B] behind[C] over[D] along
7.[A] incredible[B] spontaneous[C] inevitable[D] gradual
8.[A] fight[B] doubt[C] stop[D] think
9.[A] invisible[B] limited[C] indefinite[D] different
10.[A] upward[B] forward[C] afterward[D] backward
11.[A] features[B] influences[C] results[D] costs
12.[A] outside[B] on[C] by[D] across
13.[A] deliver[B] carry[C] perform[D] apply
14.[A] by chance[B] in contrast[C] as usual[D] for instance
15.[A] if[B] unless[C] as[D] lest
16.[A] moderate[B] overcome[C] determine[D] reach
17.[A] at[B] for[C] after[D] with
18.[A] Above all[B] After all[C] However[D] Otherwise
19.[A] fundamental[B] comprehensive[C] equivalent[D] hostile
20.[A] By accident[B] In time[C] So far[D] Better still
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