His invention ______ of no use by the scientists of that time．
A．considered beingB．considered to be
C．was considered to be D．was considered being
C
考查動(dòng)詞的語態(tài)。主語His invention和動(dòng)詞consider之間是動(dòng)賓關(guān)系，所以要用一般過去時(shí)態(tài)的被動(dòng)語態(tài)，排除A,B；consider在句中作認(rèn)為講，consider sth. to be …認(rèn)為……是……。所以選C。
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