You may use bike________ you give it back to me tomorrow morning
B
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Itisnotabadmovie,butthereisnothing_(origin)aboutit.
Ataskofthepostofficestaffisto_(class)mailaccordingtotheplacesitistogo
Manyothernewtechniquesarenowavailablethatenablemoreresearch___(do)inthetesttubetoseeifchemicalsproduceharmfulbiologicaleffects.
TheUnitedStatesisacountry_(advance)inscienceandtechnology
Thefixedstarwasaplanet.（）