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.