请问构成作品应具备哪些条件？

Many things _____ impossible in the past are common today.

A．considered

B．to consider

C．considering

D．being considered

Excuse me, but could you tell me _______?

A．what is your name

B．how I can call this young lady

C．what is the matter with you

D．how long the dog has died

服装CAD和服装CAM的概念

社会文化群可分为（）、宗教、种族和地理等四个亚文化群。

A.城乡

B.年龄

C.部落

D.民族

能代表病毒体的是病毒的

A．核酸

B．衣壳

C．核衣壳

D．包膜

E．刺突