A. Since B. OnceC. WhetherD. Although

______, he swore that he was not asleep.A．Although I had difficulty in waking himB．Since I

Although Darwinism was a profoundly ______ world view, it was essentially passive, since i

【C5】A．untilB．onceC．afterD．since

A．unlessB．onceC．whileD．as

A．ifB．onceC．whenD．whereas

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