问题补充:
单选题Wemustkeepourroomclean,fordirtanddiseasego______,youknow.A.hand in handB.step by stepC.from time ti timeD.one zfter another
答案:
A解析句意:我们必须保持室内卫生,你知道脏乱与疾病是分不开的。hand in hand---happenning together and closely connected密切相关的,同时发生的。本句还可说成:Dirt goes hand in hand with disease.
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