I soon found that the work I was doing had already been done by someone else -_____, I was wasting my time.[ ]

A. in a word

B. in all

C. in other words

D. in words

在广泛吸收欧美服饰优点的基础上形成的中国近现代民族服饰是

A．①③④

B．②③④⑤

C．②④

D．③④⑤