200209缺少的3道题补充(疑问)

13.  Interest in the ancient art form of mural painting was rekindled _____for the    1893 Chicago World's Fair.

    A. when the murals created

    B. the murals that were created

    C. and the murals to be created

    D. by the murals created

A

出现状语从句是正确的

14 The seventeenth-century discovery _____of life that are invisible to the naked eye was a dramatic one in human history.

   A. of forms

   B. that forms

   C. forms

   D. forms are

A

只有A的形式既满足前面discovery又满足后面的are

15 Astronmers believe that almost every galaxy probably has a huge black hole at ______center.

A. its

B. it has a

C. it

D. it is

D. it is

A

这里缺物主代词

13题我不太明白为什么不是D,