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grammar questions
Hi : I have some grammar questions. If you know the reason for the correct answer, please teach me. Thanks for you time and attention.
1. ____ ballet dancers learn five basic positions for the arms and feet. (why the answer is "All of" instead of "All")
2. Ruth Bader Ginsburg argued six women's rights cases before the United Stated States Supreme Court in the 1970's,-------. (why the answer is "winning five of them" instead of "of them five winning")
3. [In] plane geometry, the sum of [the internal ] angles of [any] trangles [has] always equal to 180 degrees.
4. For [each] enzyme reaction [there is] an optimum [ temperature which] maximum [efficency] is achieved.
5. The [orbit] of a celestial [body] is [ usually] in the shape [ of ellipse].
6. Chicago is [the third] largest [publishing] [center] in the united States, [exceeding] only by New York city and San Francisco.
7. Lowell, Massachusetts, known as the 'Spindle City' [since] 1822 [when] its first textile mills were built, [attracted] worldwide attention [ as textile] center.
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