问题
选择题
Whoever invented______ wheel is believed to have made______ most useful invention in______ history.
A．a; the /;
B．the; the; /
C．the;. /; /
D．a; a; the.
答案
答案：B
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Whoever invented______ wheel is believed to have made______ most useful invention in______ history.
A．a; the /;
B．the; the; /
C．the;. /; /
D．a; a; the.
答案：B