Scientists have obtained more evidence ___________ plastic is finding its way into the human body.
A、whatB
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Scientistshaveobtainedmoreevidence___________plasticisfindingitswayintothehumanbody.
Acityistheproductofthehumanhandandmind,__________man'sintelligenceandcreativity.
Mr.Smithgradually_____aknowledgeofthesubject.
Wehaveenteredintoanage_______dreamshavethebestchanceofcomingtrue.
Teachershavetoconstantlyupdatetheirknowledgeinordertomaintaintheirprofessional___.
