单选题 In Joseph Mangano's opinion______.

A、 the study is worth researching deeply
B、 it is no use to study
C、 we need not pay attention to the report
D、 the unclear plants should be alarmed by the report

【正确答案】 A

【答案解析】[分析] 观点态度题。在该段中，Mangano 提到 the need for more work，也提到we need to do more follow-up，也就是说，他认为还有很多工作要做。由此本题答案应选A。B、C过于否定该报告，D则过于夸大该报告。这均不是 Mangano 的态度。