（ ）26.Make a phone call when you can’t get home as usual，_____your parents will start to worry.

A.And

B.but

C.or

D.so

26.C【解析】and“和”；but“但是”；or“否则”；so“因此”。句意：如果你不能像平常一样按时到家就打个电话，你的父母会开始担心。故选C。

（ ）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。

（ ）29.What made them miss the deadline was not their lack of funding，but_____their lack of planning.

A.Even

B.still

C.rather

D.ever

29.C【解析】not…but rather为固定搭配，表“不是……而是……”。句意：让他们错过最后期限的，不是缺乏资金，而是缺少计划。故选C。

（ ）30.—The manager dismissed twelve people without warning.

—He_____them like that.

A.hadn't treated

B.couldn't treat

C.wouldn't have treated

D.shouldn't have treated

30.D【解析】shouldn’t have done表示“过去不该做某事却做了”。句意：——这个经理毫无预告就解雇了二十个人。——他本不应该这样对他们的。故选D。