Mum, do you know if Dad _____ a model plane for me?- I think he will do if he _____ free.

Since you are in trouble, why not ______ our offer of help?

It is a good habit to______ your school things after finishing your homework.

Only when he returned _________ that the war had ended and the army had come back.

I don’t think the film named　“Hero(英雄)”　is very exciting. — I don’t think it is，____________.