I have __ ___ decided when to leave, but my sister hasn’t decided__ ___.

That is the day ______I’ll never forget.

The plane is a flying eye hospital that belongs to amedical charity called _______.

It’s very important for us to save water.—I agree with you. I hope _____ can realize that.

Thank you for the reasonable plan that you put ________ to help improve people’s living level step by step