____ is often the case, the calls from our customers are for help with their computer systems. (SCET3: 0812)

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问题 ____ is often the case, the calls from our customers are for help with their computer systems. (SCET3: 0812)

选项 A、That
B、This
C、What
D、As

答案D

解析

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四川省大学英语三级

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