问题
选择题
_____ from the past performance, he is not likely to do very well in his exam.
A．Judging
B．Judged
C．To judge
D．Having judged
答案
答案：A
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_____ from the past performance, he is not likely to do very well in his exam.
A．Judging
B．Judged
C．To judge
D．Having judged
答案：A
畸形中央尖备洞充填时穿髓应选用（）。