【题目】____ an increase in foreign legal conflicts, China is expected to see the number continue to rise.
A.To witness
B.Being witnessed
C.Witnessed
D.Having witnessed

【答案】D
【解析】考查非谓语动词。由句意可知，主句主语是China ，和动词witness之间的构成主动关系，又由主语后的be expected to 可知，从句是先前已经发生的事情，所以使用having done。综合后选D项having witnessed。同时根据排除法得到D项。