8. Judging from the message they convey, these two chapters are __________ independent of each other, that is, they are not in connection with the other at all.
A . literallyB . arbitrarilyC . randomlyD . optionally
9. General Secretary Xi Jinping _____ clarified the policy that we Chinese unconditionally aid the developing countries in need, believe it or not, without any additional conditions.
A . apparentlyB . absolutelyC . ambiguouslyD . aggressively
12. Though scientists get closer to understanding why we age, the reason for different aging rates among individuals remains only __________ understood.
A . concretelyB . thoroughlyC . vaguelyD . flexible
28. Nowadays, a lot of children have less time to play and communicate with their peer due to extra studies. ________, it is difficult to develop their character and social skills.
A . ConsequentlyB . OccasionallyC . EventuallyD . Dramatically