C
把下句变成被动语态:
Someone heard mary sing some songs...
Mary ___ some songs in her room in the morning.
Mary ___ some songs in her room in the morning.
A.heard sing
B.heard to sing
C.was heard sing
D.is heard to sing
为什么?
A.heard sing
B.heard to sing
C.was heard sing
D.is heard to sing
为什么?
英语人气:308 ℃时间:2019-11-17 19:54:12
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