96It is reported that the thirty-ninth president of America Jimmy Carter has won the Nobel Prize _____ peace in the year of 2002

The fact has worried people _______ the number of thedeaths is still increasing.

You look upset.What’s the matter—I had my proposal ________ again.

The skin, an ____ part of your body and its largest organ, ____ as a barrier against diseases.[ ]

We can never forget the days _______the two astronautsin spaceship worked together and the days _______we spent together.