【C18】A．howeverB．moreoverC．neverthelessD．therefore

A.EvenB.MoreoverC.ThusD.Ever

【C7】A．otherwiseB．moreoverC．howeverD．whatever

【C16】A．HoweverB．MoreoverC．ThereforeD．Even though

【C18】A．HoweverB．YetC．MoreoverD．Thus

【C5】A．WhileB．MoreoverC．HoweverD．Therefore

【C3】A．HoweverB．MoreoverC．ThereforeD．Anyway