从Ⅱ栏中找出能应答Ⅰ栏中句子的选项，并将其序号填入题前的括号内。(共5小题；每小题1分，满分5分)
Look,Tom is_________a letter. A.writing B.writeing
Daming and Jim_______playing the guitar. A. is B.are
Let’s________the bus. A.get on B.gets on
The children__________football. A.is play B.are playing
Where’s the train? Ir’s________the station. A. at B.in
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