report 可与 on (或 upon) 连用，但 on (或 upon) 常可省略。例如：
They will report on the experiments with coal tar. 他们将汇报煤焦油的试验情况。
He will soon report on (或 upon) the condition of the crops. 他不久将对庄稼的长势作出报告。
The developments of the situation were reported (on, upon) from time to time. 形势的发展不时地被报告。
（《薄冰英语惯用法词典》）