（ ）27.—Have you seen the film Avatar？

—Of course，I have.It was in our hometown_____the film was made.

A.When

B.wher

C.that

D.which

27. C【解析】强调句型为It is/was+被强调部分+that+其他部分，去掉It is/was和that后句子仍然成立。故选C。

（ ）28.only since the Industrial Revolution_____in places away from their homes or been left to raise small children without the help of multiple adults.

A.most people have worked

B.have most people worked

C.most people had worked

D.had most people worked

28.B【解析】以“only+状语”开头的句子，主谓要倒装，根据since the Industrial Revolution可知空格处应用现在完成时。故选B。