单项选择 适中0.65 引用3 组卷305
Listen! Can you hear the opera________ somewhere near here?
| A．singing | B．being sung | C．sung | D．to be sung |
20-21高一下·黑龙江哈尔滨·阶段练习
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Though I have often heard this song ______, I have never heard you ______ it.
| A．being sung; sang | B．sang; singing |
| C．sung; sing | D．to be sung; to sing |
This kind of robot has been ______ for cleaning the floors, which is popular in our city.
| A．signed | B．sold | C．sung | D．designed |
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