UC知道：想知道神马，提问回答学习问题百度都知道

A bird was heard __________in the tree just now.

来源：百度知道编辑：UC知道时间：2024/06/05 06:20:12

A bird was heard __________in the tree just now.
A. singing B. sing C. to sing D. sang

你好，很高兴能帮你解答。
答案：C
解析：当hear sb. do/doing sth.用在被动语态时要用to，即sb. be heard to do sth.

楼上同学的答案我不敢认同这题当选A
从语法上讲答案只可以是A或者B 又根据本题的时间状语-- just now 所以应该用进行时所以此题选A

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