The United States produced higher crop harvests before roads took away land and pollution
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A．Visit his parents.B．Write a paper.C．Observe how bees build nests.D．Plan a family reu
A. Visit his parents.
B. Write a paper.
C. Observe how bees build nests.
D. Plan a family reunion.
Animals can be made to do both when the activity of certain genes is doubled.
A. Y
B. N
C. NG
A．Piano music could interfere with your reasoning ability.B．The effects of music do no
A. Piano music could interfere with your reasoning ability.
B. The effects of music do not last long.
C. The more you listen to music, the higher your test scores will be.
D. Music, whether classical or rock, helps improve your memory.
A．Sub-standard form. of the English language.B．An ideal form. of English pronunciation
A. Sub-standard form. of the English language.
B. An ideal form. of English pronunciation.
C. A standard form. of English pronunciation among intellectuals.
D. A somewhat standard form. of English pronunciation in English.
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