The element radium, ______ in thechemistry lab, gave off a blue light.

I don’ t want to be a person that always cries, but today apparently ____

All countries need , timely and reliable climate information as well as high quality climate services , as they will benefit the whole humankind.

impressions are the most lasting.After all, you never get ________ second chance to make ________ first impression.

Three fourths of the ________ in the country have runout.A．water