2015年12月大学英语四级选词填空练习（二）

　　今天为大家准备的是四级选词填空练习题，大家一起试试看吧，做完可以对对底下的答案哦!

　　四级选词填空练习题

　　科技类

　　While still relatively novel in the United States, so-called "green roofs" — urban rooftops covered with grasses, plants and other types of greenery — are becoming increasingly popular around the world.

　　The logic is obvious: Green roofs can help to cool down buildings and pull some carbon dioxide from the air and feed it back into plant (1)_______.

　　But the (2)_______ benefits of green roofs to busy office workers may also be substantial. Kate Lee and a group of colleagues found that (3)_______ an attention-demanding task with a 40-second "microbreak" — in which one simply looks at a computerized (4)_______ of a green roof — improved focus as well as subsequent performance on the task.

　　In the research, 150 students were asked to perform a demanding task called the Sustained Attention to Response Task (SART). In the task, respondents view a (5)_______ of individual numbers, between 1 and 9, on a computer screen. Each number flashes by very (6)_______ and the research subject has to press a particular key as fast as possible — unless, the number is 3. In that case, subjects have to catch themselves and not respond — which is difficult to do, given the habit built up of repeatedly and quickly (7)_______ the key.

　　In the current study, students had to (8)_______ the SART task not once, but twice. However, they received a 40-second "microbreak" in between the two trials. During that break, their computer screens flashed either to a digital image of a city building roof covered in (9)_______, or one covered with grass and flowers. Then, they completed the remainder of the SART trial.

　　Afterward, the students (10)_______ to the green roof scene not only reported that it felt more "restorative (恢复健康的)," they performed better on the task. In particular, they showed less fluctuation in response time, and made fewer errors

　　A) series B) clicking C) image

　　D) concrete E) interrupting F) fairly

　　G) growth H) total I) exposed J) complete

　　K) panic L) explained M) rapidly

　　N) relation O) psychological

　　答案：

　　1. G) growth

　　2. O) psychological

　　3. E) interrupting

　　4. C) image

　　5. A) series

　　6. M) rapidly

　　7. B) clicking

　　8. J) complete

　　9. D) concrete

　　10. I) exposed