She is __________newcomer to _________chemistry, but she has already some important discoveries.
She is __________newcomer to _________chemistry, but she has already some important discoveries.
A、the; the
B、a, /
C、a; the
D、the,a
【正确答案】:C
【题目解析】:but在句中是表示转折的信息词.否则学生可能认为B是正确的. 其次应明确.表示新成员中的一位要用不定冠词.抽象名词或学科名词前不加冠词.

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