单项选择题

A．The heart pumps blood in two directions.
B．Time blood is circulated round the body in one direction only by the pumping action of the heart.
C．The blood moved with a backward and forward motion.
D．The heart pumps blood in all directions.
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单项选择题
A．He needs to press F7 to return to the document before he prints it.B．He has to print the document to see tile page numbers.C．The printer is not working correctly.D．The numbers are on the screen but they don’t printout.
A．He needs to press F7 to return to the document before he prints it.
B．He has to print the document to see tile page numbers.
C．The printer is not working correctly.
D．The numbers are on the screen but they don’t printout.
单项选择题
A．Because Darwin had got a lot of facts.B．Because Darwin condemned the men of the churches for their nonsense.C．Because Darwin was not a religious believer.D．Because Darwin’s story of the world was different from theirs.
A．Because Darwin had got a lot of facts.
B．Because Darwin condemned the men of the churches for their nonsense.
C．Because Darwin was not a religious believer.
D．Because Darwin’s story of the world was different from theirs.
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