The dog, if trained , will be made a good watch-dog one day．
A. properly
B. hopefully
C. personally
D. usually
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(答案→)A. properly
B. hopefully
C. personally
D. usually
解析：词义辨析题。 A．properly 恰当B．hopefully 希望C．personally个人的 D．usually 通常 如果训练得当这只狗会成为出色的护卫犬。根据语境选A