五、阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。选项中有两项为多余选项。
Farmyard robots can cut down chemical pollution
1 Many of them use chemicals to kill weeds(杂草). The trouble is, the weedkiller also kills wildlife, pollutes rivers and is bad for the fields. 2 This kind of robot can cut weedkiller use by 90%. The robot is really smart because it only kills weeds but not crops(庄稼).
3
Several cameras are built into the robot. The cameras facing the ground take photos to help the robot “see” the plants it passes.
The robot compares each photo to a library of plant photos to decide on which plants are weeds.
Robot arms move into position to give a small dose(剂量)of weedkiller on the weeds.
The robot is energy-friendly. 4
How the robot will develop
The scientists do not want to just stop at the achievement they have made. 5 The improved model of robots will exactly discover weeds and dig them out instead of using weedkiller.
Robots could be programmed to leave some harmless weeds in the fields to support wildlife living there.
A. But scientists have created a farmyard robot.
B. It is powered by the energy from the sun.
C. Where the robot is used
D. They’re working on new designs to improve the model.
E. How the robot works
F. Why do farmers choose the robot to work in their fields?
G. How do farmers usually kill weeds in the fields?
1. 2. 3. 4. 5.

五、1. G 【点拨】根据“Many of them use chemicals to kill weeds(杂草).”可知，问句应是问农民怎样除田里的杂草。故选 G。
2. A 【点拨】根据“This kind of robot can cut weedkiller use by 90%.”可知，空处应提到一种机器人。故选 A。
3. E 【点拨】空后内容都在介绍这种机器人是如何工作的。故选 E。
4. B 【点拨】根据“The robot is energy-friendly.”可知，B 项符合语境。
5. D 【点拨】根据“The scientists do not want to just stop at the achievement they have made.”可知，科学家们不想仅仅停留在他们已经取得的成就上，此处提到科学家要继续做的事。故选 D。