. Many people think that it is making such an experiment.
A. worthwhile
B. worth
C. worthy
D. valuable
网友回答
(答案→)A. worthwhile
B. worth
C. worthy
D. valuable
解析：词义辨析。Worthwhile (adj) 值得的worthwhile 用于下列句型It is worthwhile doing sth./ to do sth. 干某事是值得的worth 用于下列句型：sth. is worth sth/ doing此句型中只能用doing， 不能使用被动。 worthy 用于下列句型：sth. be worthy of sth/ being done sth. be worthy to be done。故选A。