If we don’t often use the newly learned words, we’ll _____ forget them.

She has a pen in one of her hands, but what’s that in her ______hand

Great changes have taken place in China since the People’s Republic of Chinain 1949

I found some oldpictures at the back of my drawer which _____ memories of my childhood

It’s high time that we _____ measures to stop selling polluted vegetables. [ ]