Question

As soon as the dog called Kelly noticed the stranger __________ the house, it began __________.

A.entered, barked B.enter, barking C.entered into, to bark D.entering, bark

Answer

B

【解析】

句意：那只叫Kelly的狗一注意到陌生人进屋，就开始叫了起来。

考查动词非谓语。enter进入，动词原形；entered是enter的过去式或过去分词；bark犬吠，动词原形；barked是bark的过去式或过去分词；barking是动名词形式；to bark是动词不定式形式。根据句意：那只叫Kelly的狗一注意到陌生人进屋，就开始叫了起来。词组notice sb. do sth.意为“注意到某人做过某事”，begin doing sth. 意为“开始做某事”，enter sp.表示进入某地时，其后通常不接介词into；故答案选B。