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题目内容
（国家开放大学管理英语3）
—What.s the latest situation with all these customer complaints we.ve been receiving?
—___________the quality of the material has not always been up to standard.
选择一项：
A.
I believe
B.
I.m afraid
C.
I think
—___________the quality of the material has not always been up to standard.
选择一项：
A.
I believe
B.
I.m afraid
C.
I think
参考答案
