题目内容：
_______
A．Tobacco stocks also perkeup as investions discouriefears ** of from the US. B．So far，109 countries have signeit, an12 have ratifieit.
C．The impact of the treaty coulbe huge.
D．Countries that ratify it woulbe requireto enact strict tobacco control policies.
E．The treaty calls for higher tobacco taxes, restrictions on smoking in publiplaces, anmore promotion of tobacco prevention ancessation programs.
F．F The Senate must still approve the treaty before the US can implement its provisions.
参考答案：
答案解析：