The report shows that we are making progress we need to make greater efforts.
A. but that
B. but for
C. however that
D. no matter how
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(答案→)A. but that
B. but for
C. however that
D. no matter how
解析：考查连词。That we need to make greater efforts是show的第二个宾语从句，but表示转折关系.根据句意可知：那篇报道显示我们正在取得进步但是我们需要更大的努力。