单项选择题

The medicine has many functions, ______ are unknown to us.
A) some of which C) that some of them
B) of which some of them D) which of them
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单项选择题
By the time he arrives in Beijing,we ______ here for two days. A) will have stayed C) have been staying B) shall stay D) have stayed
By the time he arrives in Beijing,we ______ here for two days.
A) will have stayed C) have been staying
B) shall stay D) have stayed
单项选择题
He is rich ______ he does not know what he is worth. A) so much so that C) not so much as B) so much as D) so much
He is rich ______ he does not know what he is worth.
A) so much so that C) not so much as
B) so much as D) so much
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