A．orB．howeverC．thoughD．even

【B3】A．IfB．AsC．ThoughD．Unless

【C6】A．UnlessB．IfC．ThoughD．As

【C5】A．becauseB．ifC．thoughD．when

【C4】A．so thatB．in order thatC．even thoughD．now that

【C9】A．becauseB．ifC．thoughD．when

A.becauseB.unlessC.thoughD.until