问题描述：
These computers are different from ________.
99. These computers are different from ________.
A. that we expected B. what we expected
C. which we have expected D. what we expect
为什么选B，不选C？
99. These computers are different from ________.
A. that we expected B. what we expected
C. which we have expected D. what we expect
为什么选B，不选C？
问题解答：
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