阅读下面的短文，在空白处填入一个适当的词，或填入括号中所给词的适当形式。

a cold morning, I(open) the window andglad to find that it was(snow) outside. I(call) Tom and asked him if he could make a snowmanme, but he had so much work to do that he(can't) go out. I(decide) to stay at home and watch a movie(call) Harry Potter. The movievery exciting.