请教几道英文语法题Theshyboyappearedintheclassroom,_hismother,whowasleadinghim_handAfollowedby...onhisBfollowed...byCfollowing...bytheDfollowing...by选C为啥?Tommetabeautifulyounggirlattheball,andan

　　请教几道英文语法题

　　Theshyboyappearedintheclassroom,_hismother,whowasleadinghim_hand

　　Afollowedby...onhisBfollowed...by

　　Cfollowing...bytheDfollowing...by

　　选C为啥?

　　Tommetabeautifulyounggirlattheball,andanhourlaterhefelthimselfhalfway_

　　inlovewithher

　　答案tofalling啥句型?

　　Thencameanewdevelopmentthathadfar-reachingeffects!

　　啥句型?为啥Anewdevelopmentcanethenthathadfar-reachingeffects!不行?