-----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.
You ____ the meeting yesterday now that you were busy .
You ____ him . He will come to realize it some day .
She ____ on her homework in her study now .
Much attention ____ pronunciation if you want to speak English well .
He must be in the park , ____ ?