问题标题：
【用a/an填空1Isit()Chinesebookor()Englishbook?2Thisis()ring,anditis()orangering.3Maryis()Englishteacher.Tomis()Chineseteacher4Thisis()bike,It's()oldbike.5Thisis()telephonenumber6Thatis()IDcard7Ilostmyke】
问题描述：
用a/an填空1Isit()Chinesebookor()Englishbook?2Thisis()ring,anditis()orangering.
3Maryis()Englishteacher.Tomis()Chineseteacher
4Thisis()bike,It's()oldbike.
5Thisis()telephonenumber
6Thatis()IDcard
7Ilostmykeys.It's()setofkeys
8It's()apple,not()pear
9Thisis()peach.That's()orange
10Youhave()banana,butIhave()egg.
安向东回答：
1Isit(a)Chinesebookor(an)Englishbook?2Thisis(a)ring,anditis(an)orangering.3Maryis(an)Englishteacher.Tomis(a)Chineseteacher4Thisis(a)bike,It's(an)oldbike.5Thisis(...
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