As Mark’s study indicated, interruption is a highly undesirable feature in high-tech office work, and therefore we must find a way to avoid them.

A．The woody stems contain more water than the leaves.
B．Only part of the carbon dioxide in the plants is synthesized.
C．The mineral elements will not be absorbed by the plant unless dissolved in their roots.
D．Air existing around the leaf is found to be saturated.

A．the functions of carbon dioxide and water
B．the role of water in a growing plant
C．the process of simple sugar formation
D．the synthesis of water with carbon dioxide