11 Write the words in right forms according to the requirements.
1. battery(复数) 2. connect(过去式)
3. electrical(名词) 4. bad(比较级)
5. safe(名词) 6. instruct(名词)
7. power(形容词) 8. rule(复数)
9. teach(过去式) 10. with(反义词)

1. batteries 2. connected 3. electricity 4. worse 5. safety 6. instruction 7. powerful 8. rules 9. taught 10. without

1. battery的复数形式是batteries（以辅音字母加y结尾，变y为i加es）。
2. connect的过去式是connected（规则动词，直接加ed）。
3. electrical的名词是electricity（去掉形容词后缀al）。
4. bad的比较级是worse（不规则变化）。
5. safe的名词是safety（形容词变名词加ty）。
6. instruct的名词是instruction（动词变名词加ion）。
7. power的形容词是powerful（名词变形容词加ful）。
8. rule的复数是rules（规则名词，直接加s）。
9. teach的过去式是taught（不规则变化）。
10. with的反义词是without（表示“没有”）。

111 Complete the sentences with proper words.
1. The e is off. Try to find a candle to light up the room.
2. I never wash clothes myself. I depend on my w machine.
3. The computer is c to the Internet by the cable.
4. A f is a piece of electrical equipment in which food is kept cold so that it stays fresh.
5. Please s off the lights before you leave the room.
6. The recorder is not working. You need to replace its b.
7. A good air c is enough to cool the place in hot summer.
8. Drivers should obey the traffic r.
9. They live in the same a to share the rent.
10. They've switched off the p.
11. Policemen are always there to keep us s.
12. The London Eye is a famous London l.
13. I can't i living in a world without sunlight.
14. He didn't reply. I, he turned around and left the room.
15. Columbus is the man who d America.

1. electricity 2. washing 3. connected 4. fridge 5. switch 6. battery 7. conditioner 8. rules 9. apartment 10. power 11. safe 12. landmark 13. imagine 14. Instead 15. discovered

1. 根据“Try to find a candle to light up the room”可知没电了，“electricity”符合，填“electricity”。
2. “wash clothes”对应“washing machine”，填“washing”。
3. “be connected to”表示“连接到”，填“connected”。
4. 描述“keep food cold”的电器是“fridge”，填“fridge”。
5. “switch off”是“关掉”，填“switch”。
6. 录音机不工作需换“电池”，填“battery”。
7. “cool the place”对应“air conditioner”，填“conditioner”。
8. “obey traffic rules”是“遵守交通规则”，填“rules”。
9. “share the rent”住的是“apartment”，填“apartment”。
10. “switched off the power”表示“断电”，填“power”。
11. “keep us safe”是“保证我们安全”，填“safe”。
12. “London Eye”是“地标”，填“landmark”。
13. “can't imagine”是“无法想象”，填“imagine”。
14. “没有回复，反而离开”用“Instead”，填“Instead”。
15. 哥伦布“发现”美洲，用过去式“discovered”，填“discovered”。