动词填空 用括号内所给动词的适当形式填空，并将答案写在答题卷标有题号的横线上。
⑴The musical video you look forward to ____ (sell) out yesterday.
⑵At this time yesterday, that woman together with her sons ____ (wait) for his    husband at the station.
⑶Look! The snow ____ (stop).Let's go outside to make a snowman.
⑷Last week they replied to my letter. They said they____ (fly) to see me the next month.
⑸I don't know what I should pay attention to ____ (reduce) the pollution.
⑹When I got to the factory, my workmates ____ (finish) their work.
⑺Our school ____ (organize) a visit to the park unless it rains tomorrow. 
⑻When we were young, our teacher told us the earth ____ (travel) around the sun.