单项选择题

A．To remind the woman to lock the door when going out.
B．To remind the man to take his keys when going out.
C．To prevent the thief to break into when going out.
D．To prevent visitors from having an accident.
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单项选择题
A．Environment and genes.B．Cells of proteins.C．Genes of parents,D．A sequence of DNA.
A．Environment and genes.
B．Cells of proteins.
C．Genes of parents,
D．A sequence of DNA.
单项选择题
A．He’s looking for ways to start his business.B．He has high reward for his overseas counterparts.C．His business starts to be prosperous.D．He’s using a business directory to develop more connections.
A．He’s looking for ways to start his business.
B．He has high reward for his overseas counterparts.
C．His business starts to be prosperous.
D．He’s using a business directory to develop more connections.
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