He insured his car ________ he had an accident.
A、unlessD
他给自己的汽车投了保，以防万一遇到交通事故。考查连词词义区分题。A否则，要不然B如果C自从，由于D以防万一，以免
Collins COBUILD English Language Dictionary (1987) has some unique features such as definition, extra column and ______.
Police are ________ the disappearance of two children.
Theword“minister”originallymeant“aservant”,butnowhaschangedto“aheadofaministry”.Thisprocessofmeaningchangeiscalled______.
______ of meaning is a process by which a word that originally had a specialized meaning has now become generalized.
—Davidhasmadegreatprogressrecently.—_______，and_______.
