高等继续教育 / 计算机专业英语
正确率：100%
题型描述: 单选题
It looks as though there ( ) some problems with my computer. Because it is so slow.
A. were
B. had been
C. has been
D. was
It looks as though there ( ) some problems with my computer. Because it is so slow.
A. were
B. had been
C. has been
D. was
参考答案：
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