单项选择题

According to the writer, the secret to perfect memory

A．has been found.
B．will never be found.
C．was found a long time ago.
D．is not in sight yet.
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单项选择题
What is the meaning of working round the clock
A．Repairing clocks.
B．Making clocks.
C．Working with a clock nearby.
D．Working day and night.
单项选择题
What does Stan Field take at breakfast
A．Food only.
B．Food and pills.
C．Nothing.
D．A plateful of pills only.
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