1. A star wil1 compress itself into a white dwarf, a neutron star, or a black hole after it passes through a red giant stage, depending on mass.
（A）A star will compress itself into a white dwarf, a neutron star， or a black hole after it passes through a red giant stage， depending on mass
（B）After passing through a red giant stage， depending on its mass， a star will compress itself into a white dwarf， a neutron star， or a black hole。
（C）After passing through a red giant stage， a star's mass will determine if it compresses itself into a white dwarf， a neutron star， or a black hole
（D）Mass determines whether a star， after passing through the red giant stage， will compress itself into a white dwarf， a neutron star， or a black hole
（E）The mass of a star， after passing through the red giant stage， will determine whether it compresses itself into a white dwarf， a neutron star， or a black hole

2. Although it claims to delve into political issues, television can be superficial such as when each of the three major networks broadcast exactly the same statement from a political candidate.
(A) superficial such as when each of the three major networks
(B) superficial, as can sometimes occur if all of the three major networks
(C) superficial if the three major networks all
(D) superficial whenever each of the three major networks
(E) superficial, as when the three major networks each

(A) cars' potential energy, gained through their being lifted by a chain drive
(B) cars' potential energy, a gain achieved as they are lifted by a chain drive
(C) potential energy from the cars' being lifted by a chain drive
(D) potential energy of the cars, gained as a chain drive lifts them
(E) potential energy gained by the cars, being achieved while a chain drive lifts them

答案是D, 不解!