单项选择题

He told me that she'd never been heard ______ so well before.

A．sang
B．sing
C．to sing
D．to singing
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单项选择题
Not only those students but also the teacher ______ something about the matter.
A．know
B．knowing
C．knows
D．known
单项选择题
Fire ______ in a neighbouring street but ______ soon.
A．broke out; put out
B．broke out; was put out
C．was broken out; put out
D．was broken out; was put out
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