＿＿＿＿＿ is our duty ＿＿＿＿＿ the environment.

Mum, can I have something_____–Oh, dear. You can only drink some water. There is____ in the kitchen.

Can I go to the museum this Sunday— No. It ______ only from Monday to Friday.

This party is ______idea! It ‘s exactly what I want .

Never believe all ____ you hear, never regret what you have never lost, and never throw away what you have in your hands.