单项选择题

Not until I wrote to him ______ that I was also in Americ

A． had he knownB. he knewC. he didn't knowD. did he know
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单项选择题
Don't be too ______ on them; after all, they are only little children.
A．strict
B．strong
C．hard
D．heavy
单项选择题
He would have to live under their ______ for the next ten years.
A．shade
B．shadow
C．darkness
D．profile
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