问题
选择题
90 % of the debts _______ so far.
A．is paid back
B．have been paid off
C．has been paid off
D．are paid off
答案
答案：C
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90 % of the debts _______ so far.
A．is paid back
B．have been paid off
C．has been paid off
D．are paid off
答案：C