Edison was the first scientist_____a modern research and development centre. A.built B.having built C.to build D.to be building
A.A
B.B
C.C
D.D
正确答案是C
Edison was the first scientist_____a modern research and development centre. A.built B.having built C.to build D.to be building
A.A
B.B
C.C
D.D
正确答案是C