Can - could - may - might

Oh, no! It _______ rain and I haven't got an umbrella with me.

This exercise is really difficult. _________ me, please.

Jack _________ come to the cinema with us, but he isn`t sure.

_________ a doughnut, please

The weather is terrible. The climbers may _______ lost

I ______ visit my grandparents at the weekend, but I'm not sure