Tom w_______ about his homework every day.
I am worrying about how I will go home on such a snowy day.(改为同义句)
I am worrying about______ _______ ______home on such a snowy day.
他必须乘火车去上班
He has to ______ _______ ______ _______ _______
(可能间隔有误!答题者可大约作答!）