Sometimes new ideas have to be tested many times before ______ . _英语解答

Sometimes new ideas have to be tested many times before ______ . A.accepting fully B.being fully accepted C.fully accepting D.fully being accepted

人气：178 ℃　时间：2020-05-22 00:45:21

解答

B 为什么？主语是ideas，此处是被动语态，所以得填be accepted，排除A，C，before是介词，后面的be就得是动名词形式being，fully修饰accepted。