单项选择题

Did you hear me ______ an English song at this time last night

A.to sing
B.sing
C.singing
D.sang
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单项选择题
Weeks after the big earthquake in Japan, hundreds of people remained struggling in their ruined homeland, ______ to be rescued.
A.waiting
B.to wait
C.waited
D.being waited
单项选择题
The first textbook ______ for teaching English as a foreign language came out in the 16th century.
A.have written
B.to be written
C.being written
D.written
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