Manyothernewtechniquesarenowavailablethatenablemoreresearch___(do)inthetesttubetoseeifchemicalsproduceharmfulbiologicaleffects.
to be done
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TheUnitedStatesisacountry_(advance)inscienceandtechnology
Hetookhisumbrellawithhimlestit____(rain).
Idon’tneedanyhelpatthemoment,butI_____youroffer
Outsleepinfluencesourmood.ourmood,________,affectsourperformance
Itwillbeinterestingtoseewhat’sgoingtohappenatthenext________(elect).