627.More TV programs,according to government officials,will be produced ____ people's concern over food safety.
A.to raise
B.raising
C.to have raised
D.having raised
628.Sit down,Emma.You will only make yourself more tired,_______ on your feet.
A.to keep
B.keeping
C.having kept
D.to have kept
627.答案是A;考查非谓语动词，to raise表示目的。
628.答案是B;keeping 表示持续发生的动作且现在也在进行。
