单项选择题

A．Sperm, cells, DNA and other genes.
B．Sperm, cells, DNA and other products.
C．Sperm, organs, DNA and other genes.
D．Sperm, organs, DNA and other products.
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单项选择题
A．He wanted Cathy to come, but he couldn’t.B．He invited Cathy to the party.C．He didn’t invite Cathy to the party.D．He couldn’t invite Cathy because he was not the holder.
A．He wanted Cathy to come, but he couldn’t.
B．He invited Cathy to the party.
C．He didn’t invite Cathy to the party.
D．He couldn’t invite Cathy because he was not the holder.
单项选择题
A．She is busy at work.B．She is shopping at supermarket.C．She is resting in bed.D．She is out for a party.
A．She is busy at work.
B．She is shopping at supermarket.
C．She is resting in bed.
D．She is out for a party.
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