单项选择题

In this experiment, they were wakened several times during the night, and asked to report what they ______.

A．have just been dreaming
B．had just been dreaming
C．are just dreaming
D．had just dreamt
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单项选择题
Evidence came up ______ specific speech sounds are recognized by babies as young as months old.
A．what
B．has
C．that
D．whose
单项选择题
You must ______ your application before next Wednesday.
A．meet
B．hand
C．submit
D．pay
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