We have worked together in harmony for many years, and I find it _________ with them．
A.worthy of workingB.useless to workC.worth workingD.worthwhile working在线课程D
句意：我们已融洽合作很多年了，我发现与他们合作很值得。it是find的形式宾语；worthwhile是宾补，working with them是真正的宾语。形式主语或形式宾语常与worthwhile连用。