题目内容：
I'mworking________ mycomputer.
[ ]
A. inB. on
C. at
参考答案：
单选题：I'mworking________ mycomputer.[ ]A. inB. onC. at-五年级..
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B. on
C. at
B. on
C. at
选出每句中错误的一项，并在横线上改正。( ) 1.Whathappenstoth..
选出每句中错误的一项，并在横线上改正。( ) 1.Whathappenstothetreesondifferentseasons? A B C( ) 2.Youcanaskmuchotherquestions. A B C( ) 3.Thewaterisverycoldtojumpin. AB C( ) 4. Iliketowatchthebirdstoflyinthesky. A B C( ) 5. Iknowonkites. A B C
Doyouhavelunch________ school?[ ]A.toB.inC.atD.on-四年级..
Doyouhavelunch________ school?[ ]A.toB.inC.atD.on
Wewillgohome________ fifteenminutes.[ ]A. inB. onC. atD...
Wewillgohome________ fifteenminutes.[ ]A. inB. onC. atD. for
Igo_________thewashroom.[ ]A.forB.toC.at
Igo_________thewashroom.[ ]A.forB.toC.at
Mike'sbirthdayis_________ spring.[ ]A. inB. onC. at-五年..
Mike'sbirthdayis_________ spring.[ ]A. inB. onC. at