第1个回答 2014-10-12
Do they work in the hospital？ They worked........ They are working.......
第2个回答 2014-10-12
第3个回答 2014-10-12
一般疑问 Do they work in the hospital?追答
一般过去 They worked in the hospital.
现在进行 They are working in the hospital.
第4个回答 2014-10-12
they're working in the hospital /do they work in the hospital ?,/they work in the hospital追答
they're working in the hospital /do they work in the hospital ?,/they worked in the hospital
第5个回答 2014-10-12
Do they work on the hospital ?追答
They worked in the hospital .
They are working in the hospital
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