Madame Curie is believed _______ radium.

_______ his membership card, Tony decided to make a phone call to check whether there was something wrong．

—What made ber so sad?    —______a good chance to go abroad.

—What made ber so sad?    —______a good chance to go abroad.

---What do you think made the girl so glad?
--- __________ a beautiful necklace.

Turning around, he found her eyes _________ upon his face with an eager expression.

The student, if well_________, will pass the examination without much difficulty.

_____ his homework in time, he had to stay up late into the night.

That it keeps raining cats and dogs ________ the tourists.

There are three eggs _______ by the hen_______ under the tree.