[A] Although[B] Unless[C] As[D] If

【C12】A．AsB．As ifC．ThoughD．Unless

____________________[A] even if [B] if only [C] only if [D] as if

_________[A] if [B] unless [C] as [D] lest

___________[A] Since [B] If [C] Unless [D] While

_________(59)A.unless B.ifC.as D.since

59._________A.Unless B.OnceC.IfD.Although