单项选择题

______ you as soon as I know what______.

A．I' 11 phone...does happen
B．I' 11 phone.., has happened
C．I am phoning.., happens
D．I am going to phone.., happens
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单项选择题
We should make mental preparation for failure, because there is only a(n)______number of possibilities of success.
A．infinite
B．finite
C．innumerable
D．numerous
单项选择题
The hostess welcomed her guests in a ______manner, which made all the people present at ease.
A．spacious
B．suspicious
C．gracious
D．merciful
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