20．Are all of the tools theseengineers'?——青夏教育精英家教网——

20．Are all of the tools （工具） theseengineers'（工程师）？

19．Tomorrow will be my sistertwelfth（十二） birthday．

18．You can find more usefulinformation（信息） on the Internet．

17．---When ______________ the League？---In 2011．（　　）

	A．	have you joined		B．	have you become a member of
	C．	have you been in		D．	did you join

16．I find this computer game ________ to play．（　　）

15．The box is not light enough for me to lift．（保持句意不变）
The box istoo heavy for meto lift．

14．Could you please tell me how I can start the machine？（保持句意不变）
Could you please tell mehow to start the machine？

13．We use computers to search for imformation．（就划线部分提问）
What do we use computersto do？

12．Tom has already finished his homework．（改为否定句）
Tomhasn't finished his homeworkyet．

11．We should take action to prevent waterpollution （污染） because people can't live without water．

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