这道题是加 to do 还是doing?My hobby is( ) all kinds of stamps.A. to collect B. collecting

positive doing还是to do还是do? dislike doing还是to do delay doing 还是TO DO plan to do 还是doing refuse to do还是doing pretend doing 还是to do refuse to do 还是doing finish + doing还是+to do? remember+doing 还是+to do to+什么 doing 还是do consider to do 还是doing swear+doing还是to do? Should to do还是doing ignore to do 还是doing start+to do还是doing practice to do 还是doing? do harm to doing还是do object to doing 还是object to do 还是object doing?!