【C15】A．reasonB．contributionC．explanationD．relation

【C2】A．reasonB．noticeC．warningD．signal

【C12】A．participationB．contributionC．involvementD．participant

材料题请点击右侧查看材料问题 查看材料A.reasonB.effectC.

【C3】A．motivationB．contributionC．performanceD．response

The author is showing his______in writing this passage.A．reasonB．rageC．worryD．objection

【C7】A．reasonB．purposeC．causeD．goal