小儿麻痹症在肺胃症状消失几天后复又发热:()
A.1~5天
B.3~4天
C.3~5天
D.5~10天
E.1~2周
参考答案:B
The other day, the students in Class 5 ___on a trip to the countryside.[ ]
A. go
B. went
C. will go
D. going
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