The（）of blood always makes me feel sick.

单项选择题Mrs Black doesn’t believe her son is able to design camera．（）？

A.is he
B.isn’t he
C.doesn’t she
D.does she

单项选择题At the conference，people of different（）were given a chance to exchange theirs with each other.

A.points
B.manners
C.views
D.ways