1)使用《牛津英语搭配词典》查“viable”,了解它作为名词时的常用搭配
prove viable:证明可行
seem viable:看起来可行
sound viable:听起来可行
None of the projects proved financially viable.
become viable:变得可行
remain viable:保留生存力
make sth viable:使......可行
It is only their investment that makes the programme economically viable.
consider sth viable/regard sth as viable:认为某事可行
extremely ,truly viable:切实可行
perfectly viable:完全可行
a perfectly viable form of political organization
potentially viable:可能可行
no longer viable:不再行得通
comnercially,economically,financially viable:商业上可行/经济上可行/财政上可行
2)翻译下面的句子
中国经济下行，许多O2O模式显得不再可行
During downtowns in China,many O2O models seem viable no longer.
3)结合自己的生活、学习、工作和兴趣，想象在什么语境下会用到这个表达。先简要描述这个场景，再造句。
场景:把方案变得切实可行是需要反复调查论证的，不是听上去可行就行了。
造句:It requires repeated surveys and studies to make the programme viable .It is not enough to sound viable.
