With the nuclear crisis worsening in Iran, the world's attention is fixed again on  is called the Middle East．

 With the nuclear crisis worsening in Iran, the world's attention is fixed again on      is called the Middle East.

A.which        B.that        C.what      D.it

With the nuclear crisis worsening in Iran, the world’s attention is fixed again on        is called the Middle East 

A、which          B、that                        C、it                            D、what

With the nuclear crisis worsening in Iran, the world's attention is fixed again on  is called the Middle East．

With the nuclear crisis worsening in Iran, the world’s attention is fixed again on ________

is called the Middle East.

A. which           B. what           C. that                 D. it