单选题
The project required ten years of diligent research. A.hardworking B.basic C.social D.scientific
【正确答案】
A
【答案解析】[解析] 划线词为形容词,意思是“勤奋的”,与A项hardworking(刻苦的,努力的)意思相近,又如:Chinese people are hardworking.中国人民是勤劳的。B项意为“基本的”,例:The basic requirement is to be on time.最基本的要求就是要准时。C项意为“社会的,交际的”,例:We should attend the social activities as much as possible.我们应该多参加社交活动。D项意为“科学的”,例:The theory is scientific.这个理论是科学的。