about the result of the experiment he still wants to give it a tryA. Uncertain as he isB.

问题补充：

about the result of the experiment，he still wants to give it a try．

A. Uncertain as he is

B. As uncertain he is

C. As he is uncertain

D. Uncertain is he as

答案：

(答案→)A. Uncertain as he is

B. As uncertain he is

C. As he is uncertain

D. Uncertain is he as

解析：句意：虽然他对实验的结果不是太确定，他还是想试一试。As可以用于倒装句，表示“虽然”，结构是：形容词/副词/动词/(不加冠词的)名词+as/though+主谓，符合这个结构的是A项。