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【单选题】
In this passage, the author mainly tells us ______A.
everyone has bad memories sometimes no matter how old he is
B.
we can prevent our mind from aging with various methods
C.
brain aging starts at the time when we are in the 20s and 30s
D.
memory loss is not the sign that we are getting old
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举一反三
【单选题】After the Nobel Prize in literature in 20l2, all books of Mo Yan became quite________ among China and many Other countries.
A.
active
B.
necessary
C.
Popular
【多选题】根据规定，旅行社应当对旅行社依法承担的下列责任投保旅行社责任保险
A.
旅游者自身造成伤亡赔偿责任
B.
旅游者因治疗支出的交通、医疗费赔偿责任
C.
旅游者伤亡处理和遗体遣返费用赔偿责任
D.
由于旅行社责任争议引起的诉讼费用