单项选择题


A．for the train to start
B．the train starting
C．the train start
D．for the train starting
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单项选择题
A．what he is likeB．what is he likeC．how he isD．how is he
A．what he is like
B．what is he like
C．how he is
D．how is he
单项选择题
A．had been workingB．have been workingC．workedD．have worked
A．had been working
B．have been working
C．worked
D．have worked
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