| This doubt had been in my mind for some time, but the research still went on _____ some reasons. |
A. to B. about C. for D. in |
科目：高中英語 來源： 題型：單選題
科目：高中英語 來源：月考題 題型：單選題
科目：高中英語 來源：貴州省模擬題 題型：單選題
科目：高中英語 來源： 題型：
14．This doubt had been in my mind for some time, but the research still went on____some reasons.
A．to B．a(chǎn)bout C．for D．In
科目：高中英語 來源： 題型：
This doubt had been in my mind for some time, but the research still went on some reasons.
A．to B．a(chǎn)bout C．for D．in
科目：高中英語 來源：貴州省2010屆高三普通高等學(xué)校招生適應(yīng)性考試 題型：單選題
14．This doubt had been in my mind for some time, but the research still went on____some reasons.
| A．to | B．a(chǎn)bout | C．for | D．In |
科目：高中英語 來源：貴州省湄潭中學(xué)2012屆高三第三次月考英語試題 題型：014
This doubt had been in my mind for some time, but the research still went on _________ some reasons．
to
about
for
in
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