3.?C。“of+'s所有格”结构称为双重所有格。A项的错误是uncle后应加's所有格形式；B项错误在于 John后应用's所有格形式。D项错误是两个词都没有's所有格。

2.?B。如果你想知道词义，就必须在“字典”里查单词。

1.?B。前一句说到“高先生”是老师，可知他在“学校”工作。

25．“Whose is it？”It's _______ ．”(北京2000)

　 A．John　　 B．John's　　 C．Johns'　　 D．John

题例解疑：

24．Mr．Smith always has _______　to tell us．(河南2002)

　 A．some good pieces of news

　 B．some pieces of good news

　 C．some good piece news

　 D．some piece good of news

23．There are few _______　 in the fridge．Let's go and buy some peas，carrots and cabbages．(河南2002)

　 A．vegetables　　 B．fruit　　 C．meat　　 D．egg

22． _______ comes from sheep and some people like eating it．(辽宁2002)

　 A．Wool　　　 B．Pork　　 C．Mutton　D．Milk

21．Let the children go away．They're making too much _______　here．(辽宁2002)

　 A．noise　　 B．voice　　 C．noisy　 D．sounds

20．He has been in Tianjin for ten years．Tianjin has become her second _______　．(天津2002)

　 A．family　　 B．house　　 C．home　　 D．room

19．The market isn't far from here．It's only _______　 bicycle ride．(天津2002)

　 A．half an hours’　　　 B．half an hour's

　 C．half an hour　　　　　 D．an hour and a half