问题
选择题
Mary wrote an article on ____the team had failed to win the game .
A．why
B．what
C．who
D．that
答案
A.
“the team had failed to win the game”是词on的宾语从句，从句中不缺主干，故排除B和C.再根据句意 “为什么这个队没能赢”
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