His ability is beyond question; ______ has been in doubt is ______ he is prepared to work hard.
A.what; that | B.what; whether | C.which; whether | D.that; that |
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His ability is beyond question; ______ has been in doubt is ______ he is prepared to work hard.
A.what; that | B.what; whether | C.which; whether | D.that; that |