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

Tom is immensely curious about everything and as eager to find the answers as if he______d

As a general rule, snakes ______ unless offended.A will not be bitingB do not biteC are

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

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

_________(53)A.and B.butC.yet D.unless

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