题目内容
46.___
A. New theories about the origin of language.
B. How to teach grammar to children.
C. Mistakes children sometimes make.
D. The stages of children's language learning.
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48.___
A. Between four and eight months.
Between one year and eighteen months.
C. Between two and three years.
D. Between three and four years.
49.___
A. They are the same in all languages.
B. They are often misinterpreted.
C. They are learned by imitation.
D. They are quite logical.
50.___
A. They are too complicated.
B. She doesn't have time to talk about them today.
C. The class didn't have a chance to read about them.
D. She doesn't agree with them.
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