{01}The dog may be a good companion for the old. _______, the need to take it for walks may be a disadvantage.
A.Besides.
B.However
C.Therefore
D.Instead.
解析:考查连词。前一句话有good,后面一句话有disadvantage,前后两句话有转折关系,所以选择 however。句意:狗也许是老年人的好陪伴。然而需要带着狗去散步时也许有不便。 本题选B。 {02}The UN is an important international organization _____helps many people around the world.
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