Experts felt obliged to investigate, oblige是动词为何能做为宾语...答:finish,enjoy,keep,mind,avoid,practise,suggest,consider(考虑),spend,imagine,escape,miss,delay,insist on,give up,keep on,can't help,look forward to,be used to,feel like .v+to do/doing:stop to do(停下来去做)/stop doing(停止做),go on to do(接着做另一件事)/go on doing(...