―_______do they go to school every day ―On foot ,of course .

Tom, you didn’t come to the party last night?— I _____ , but I suddenly remembered I had homework to do

The government has taken some measures to solve the shortage of electricity, but it may be some time _______ the situation improves

In China, all the students work hard at school _________ going to university for higher education in the future

______ change her mind, even though she knew the plan was hard to carry out.