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While____the dog,you should take care not to____.Otherwise,it may be dangerous to strangers.
A．walking; get looseB．walk; be loose
C．walking for; get it looseD．training; get it run
A
考查狀語從句的省略和系表結(jié)構(gòu)。考查狀語從句的省略。當狀語從句的主語與主機主語一致的時候，且狀語從句中有be動詞的時候，可以把主語和be動詞一起省略。本題的walk與后面主語you構(gòu)成主動關系，使用現(xiàn)在分詞的形式，在while于walking之間省略了you are.系動詞get后面接形容詞loose，構(gòu)成系表結(jié)構(gòu)。句意：當你在遛狗的時候，當心一點不要松開，要不然對陌生人會是很危險的。故A正確。
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