and 前后动词时态必须一致
and前面讲的是过去的事，后面说的现在的事情 那前后时态是否应该一致
The memoirs of President Cliton begin with his childhood in Arkansas and culminate in his rise to the presidency.
The memoirs of President Cliton began with his childhood in Arkansas and are culminated in his rise to the presidency.
请比较上面两段话，哪句更优？