问题
选择题
We have been informed that he had done _____ visits were essential by eleven o'clock last night. [ ]
A. all
B. what
C. that
D. all that
答案
答案：B
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We have been informed that he had done _____ visits were essential by eleven o'clock last night. [ ]
A. all
B. what
C. that
D. all that
答案：B