Jennifer likes kids very much.She is good______ kids.[ ]

They will try their best in the Dragon Boat Racing _______ they may fail.

My bike is broken. May I go ______ yours?—- Sorry, mine ________ broken down.

Look! Mrs. Green is talking ____ the students of ClassⅠon the ground. [ ]

Liu Huan is a great singer ________ long hair. [ ]