【C16】A．whetherB．whenC．whereD．why

【C12】A．whetherB．thatC．whichD．why

A．WhetherB．WhenC．IfD．Although

I doubt____________he will lend you the book.A.whetherB.whenC.thatD.which

__________ 查看材料A.HowB.WhenC.WhereD.Why

【C16】A．BecauseB．WhenC．BeforeD．Although

【C12】A．whetherB．whenC．unlessD．or