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My wallet is nowhere to be found.I_____it when I was on the bus.
D
musthave+done用于推斷過(guò)去某個(gè)時(shí)間肯定發(fā)生了的事情。
Thereisn‘tmuchmilk_____isleftinthebottle.
Ifhe_____thestorekeeper‘sscissors，hewouldhaveforgottentobuyapair.
Thosepeople_____ageneralunderstandingofthepresentsituation.
Iwilldotheclearingifyousee_____thelunch.
“Itwasverycoldtesterday.”
“_____.”
