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A. prefer am preferring have preferred preferred
prefer preferred have preferred am preferring
used to drink ; is used to drinking used to drinking ; drinks is used to drinking ; used to drink is used to drink ; is drinking
prefer preferred have preferred am preferring
are used to have are used to be used to have used to be
prefer preferred have preferred am preferring
prefer preferred had preferred am preferring
use to used to is used to was used to
prefer am preferring preferred will prefer
used to drink; is used to drinking used to drinking; drinks is used to drinking; used to drink is used to drink; is drinking
used was used have used had used
used to drink; is used to drinking used to drinking; drinks is used to drinking; used to drink is used to drink; is drinking
prefer preferred have preferred am preferring
use to was used to am used to used to
prefer preferred have preferred am preferring
used to drink; is used to drinking used to drinking; drinks is used to drinking; used to drink is used to drink; is drinking
used was used have used had used
was used to；was used to used for；used to was used for；was used to was used for；used to
prefer preferred have preferred am preferring
used to drink is used to drinking used to drinking drinks is used to drinking used to drink be used to drink drink
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