题目内容
9.Birds aresinging(sing).Their beautiful sounds make people happy.分析 鸟儿们在歌唱.他们优美的歌声使人们快乐.
解答 答案:singing
根据该空处在句中作谓语故填入动词的正确形式,结合下文Their beautiful sounds make people happy."他们优美的歌声使人们快乐."可知该句强调的是正在发生的动作故确定为现在进行时态,其结构为is/am/are+现在分词,结合空格前有be动词are,故填入谓语动词sing的现在分词即可,故答案为:singing
点评 本题考查用所给单词的适当形式填空,首先要根据语境明确句意,然后再根据相关语法对所给单词在形式上做出正确的变化.
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