Dad, I ______ the theatre for a while, but I left my ticket at home.— Don’t worry, my boy, I will take it to you.

Every Earth Day , We are made _____ signs to warn people to protect the nature .

His dog did everything he told it to do. ___ a most obedient animal.

If it________ , I will go to the Central Park with my son this weekend.

Who do you think is the man __________ first flew into space in China? — Yang Liwei is.