What is the percentage of all the adults who are now HIV－positive in Botswana？A．35%.B．37%.

What remains of a word after the removal of all affixes is a stem.（)

What is the main idea of the passage？A．Man－smokers live shorter than woman－smokers.B．All t

What percentage of the worlds important fish stocks is already over-exploited, according t

What is the percentage of the population who are illiterate？A．6%.B．5%.C．2%.D．8%.

What is the percentage of the sugar used as food？A．19%.B．90%.C．10%.D．30%.

What is the percentage of the British who will check work emails on vacation？A．36%.B．87%.C