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1. Most boys grow a lot between the ages of 9 and 14.

2. Most boys grow a lot between the age of 9 and the age of 14.

2-1. Most boys grow a lot between at the age of 9 and at the age of 14.

2-2. Most boys grow a lot between at the age of 9 and the age of 14.

3. Most boys grow a lot between at 9 and 14.

4. Most boys grow a lot between at 9 and at 14.

(Are they all the same?)

5. He grew 7 cm last year.

6. He grew 7 centimeters last year.

7. He grew by 7 cm last year.

(Are the three sentences grammatical?)

• english -

#2.1, #2.2, and #3, #4 = for both of these you can not use both "between" and "at" and because of 2 years, between is best.

The last set is OK. (5, 6, 7)

Sra

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