[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
[完成句子]Certainly there are millions who need to lose weight. But there are also millions who only imagine they need to. Compulsive and continuous dieting， not to mention eating disorders， shows that some of us will do anything to reduce our bodies down to the currently desirable shape. But is being underweight really desirable?
A great many people go on a diet to__________.
B、have a body shape that all people will admire
C、prolong life span
D、get ride of digestive system diseases
答案解析：本段文字指出，很多人为了达到当前流行的体型(reduce our bodies down to the currently desirable shape)而不惜通过节食等方法减肥。因此选择B。