The people who objected to cloning human beings went on strike and the traffic.
A. cut through
B. faded out
C. held on
D. held up
网友回答
A. cut through
B. faded out
C. held on
(答案→)D. held up
解析：短语辨析。A.刺穿；抄近路 B.淡出；渐弱 C.等一下；继续 D.阻挡；拦截。
句意：反对克隆人的人们继续罢工，阻断了交通。故选D。