单项选择题
A．follow B．chase C．seek D．pursue
This video may be freely reproduced （） commercial promo...
单项选择题This video may be freely reproduced （） commercial promotion or sale.
A．as for B．except for C．thanks to D．up to
By 2050 the world will have about 2 billion people aged...
单项选择题By 2050 the world will have about 2 billion people aged over 60, three times （） today.
A．as much as B．as that of C．as many as D．as those of
He added that the state government has made （） arrangem...
单项选择题He added that the state government has made （） arrangements for the conference.
A．accurate B．absolute C．adequate D．active
