问题
选择题
His classmates offered him their congratulations ______ his successful performance.
A．at
B．on
C．for
D．of
答案
答案：B
题目分析：句意：他的同学对他的成功表演表示祝贺。这里使用短语congratulations on sth“祝贺某事”，所以选B。
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His classmates offered him their congratulations ______ his successful performance.
A．at
B．on
C．for
D．of
答案：B
题目分析：句意：他的同学对他的成功表演表示祝贺。这里使用短语congratulations on sth“祝贺某事”，所以选B。
