结合语境修改画线病句最恰当的一项是（  ）
月球上特有的矿藏和能源，是对地球资源的重要补充和储备，对人类社会的可持续发展具有深远影响。科学考察探明，月球上已知矿物有一百多种，其中有五种地球上没有。月壤中还含有地球上少见的氦-3，它即使能在核聚变反应中释放巨大能量，也几乎不产生放射性污染，因此，被认为是二十一世纪的完美能源。

在实验《观察DNA和RNA在细胞中的分布》中，8%盐酸的功能是____ 

⑴Why can't you eat the cake?____            A. You can walk there.

⑵How do I get to the bus stop?____         B. No, he can't. He's too young.

⑶Where's the soup?____                           C. No, it's in June.

⑷What's wrong with Tom?____                 D. They are playing football.

⑸What are the boys doing?____               E. It's in May.

⑹Can Bobby ride a bike?____                   F. It smells nice.

⑺How's the meat?   ____                          G. Because it's too sweet.

⑻Does Lily like singing?____                    H. His arm hurts.

⑼When's Mother's Day?  ____                  I. It's on the table.

⑽Is your birthday in May?  ____               J. Yes. She sings well.