[完成句子]In Britain， robot sales appropriately peaked in 1984， but have been declining ever since. This is partly because， British wage rates are too low to make robots financially attractive and partly because engineers now have more experience with robots and are more aware of the difficulties of introducing them effectively.
Robots are less popular in Britain today partly because __________.
A、too much energy
B、based on American designs
C、they are too costly
D、they are not reliable
[概括大意]Our bodies are estimated to be about 60 to 70% water. Blood is mostly water， and our muscles， lungs， and brain all contain a lot of water. Water is needed to regulate body temperature and to provide the means for nutrients (滋养) to travel to all our organs. Water also transports oxygen to our cells， removes waste， and protects our joints and organs.
The main idea of this paragraph is__________.
A、Ounces of Water Needed Per Day
B、Importance of Water
C、Water in Our Body
D、The Function of Water