72. The soil can a_______ water , so it helps to keep water from flowing away.

71. Marine animals and plants take a________ of the density of water.

70. All your luggage will be t_________ to the destination by train.

69. People like to take the s__________ because it is faster than buses and cheaper than taxis.

68. Scientists often have to r______ on government support in order to do research.

67. I studied a_____________ because I want to see more about the world.

66. Do these books have anything in c_____________?