单项选择题

A．They eat protein.
B．They never move from one location.
C．They cause erosion of rocks.
D．They are found only in deep water.
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单项选择题
A．can be predicted at birthB．stays the same throughout his lifeC．can be increased by educationD．is determined by his childhood
A．can be predicted at birth
B．stays the same throughout his life
C．can be increased by education
D．is determined by his childhood
单项选择题
A．He decided not to attend summer school.B．He may have difficulty working and studying at the same time.C．He’s working hard so that he can afford to go to New York.D．He’s teaching school this summer.
A．He decided not to attend summer school.
B．He may have difficulty working and studying at the same time.
C．He’s working hard so that he can afford to go to New York.
D．He’s teaching school this summer.
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