The fact she has not said anything at the meeting all of us

Did you have a hard time traveling back home?—–Yes, it ______ for four days when I arrived in Guiyang and all the roads______ covered with ice

He will take up _______ ones if he has a lot of different tasks to choose from.[ ]

I really can’ t understand ______ her like that. [ ]

Thanks to the good care of the nurses ,the boy is ______ recovering from his lung operation .