单项选择题

A．They had no pollution.
B．They had small boats.
C．They could not think.
D．They could not dive deep.
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单项选择题
A．Vitamin C.B．Vitamin D.C．Vitamin A.D．B vitamins
A．Vitamin C.
B．Vitamin D.
C．Vitamin A.
D．B vitamins
单项选择题
A．The man should sit in the back of the classroom.B．The man should go to class.C．The homework was very easy.D．She’s further behind in her work than the man is.
A．The man should sit in the back of the classroom.
B．The man should go to class.
C．The homework was very easy.
D．She’s further behind in her work than the man is.
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