问题
选择题
77. --- Have all the important letters been delivered at the first time?
--- I’m sorry. _______ only 40% of them.
A．It is
B．They are
C．There are
D．It has been
答案
A
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77. --- Have all the important letters been delivered at the first time?
--- I’m sorry. _______ only 40% of them.
A．It is
B．They are
C．There are
D．It has been
A