—______ is this? Is it a ruler?—Yes, it is a red ruler.
It is careless him to make the same mistake again. I think it important him to be more careful next time.
--- Do you have __________ else to say for your mistakes? --- ________ but sorry.
About _______of the engineers in my company seem to be in their _________.
--- Could you tell me __________? --- Certainly. In half an hour.
--- Mum, why don’t you have the robot ________ housework for you?--- Oh, it caught a virus, I should have it _________ at once.