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题目内容
（河北农业大学大学英语Ⅳ）
There are a number of different occasions when you might be ________ to make a speech. Therefore, you need to practice how to speak to a large audience.
A、
calling upon
B、
called upon
C、
calling down
D、
called down
A、
calling upon
B、
called upon
C、
calling down
D、
called down
参考答案
