Manyothernewtechniquesarenowavailablethatenablemoreresearch___(do)inthetesttubetoseeifchemicalsproduceharmfulbiologicaleffects.
to be done
暂无解析
_______(safe)needstobeimprovedontherailwaysinthatcountry
Thetheoryofblackholesinspace__(accept)bymanyseriousscientistsandastronomers.
thebossescannotdowithoutprofit,workershaveanedge.
Heblamedhispoorperformance_____jetlag
Nosooner()hadIreachedhomethanMichaelarrivedwithJaneinhiscar
