Scientists say it may be five or ten years _______ it is possible to test this medicine on human patients.
Paper money was in_______use in Chinawhen Marco Polo visitedthe country in________thirteenth century.
—Doyoumindmysmokinghere? —________
She wears so red clothesthatIeasily________her in the crowd.
Iboughtadressforonly10dollarsinasale;itwasareal_______.
.Inthedarkstreet,therewasn’tasingleperson,_______shecouldturnforhelp.