英語教室：不定冠詞-a an 的用法-This is a pen. That is an apple. Give me a glass of milk. A man came here. A cow is useful animal, I take a bath once a day. Half an hour. Such a thing. She has some oranges. She has an orange.
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英語教室：不定冠詞-a an 的用法-This is a pen. That is an apple. Give me a glass of milk. A man came here. A cow is useful animal, I take a bath once a day. Half an hour. Such a thing. She has some oranges. She has an orange.