Why don’t those children go to school? They’re too young to work in the factory. –Maybe their parents can’t_______their education.

When _____ your mother _____ you that blue dress, Lucy? —Sorry, I really can’t remember. Maybe two or three weeks ago.

Hey guy, turn it off please. We don’t __________music in the reading room. —Oh ,sorry!

His brother is _________ to carry the heavy box.

So far we have done a lot to build a low-carbon economy, yet it is still _________ ideal. We have to work even harder.