请教一语法题，迷惑中~~~

statistics

1.leopard seal is the only pinniped_______preys on penguins and other seals.

     A. that normally

     B.that it normally.

这里leopard seal是主语，is 是谓语，the only pinniped是宾语。所以后面一定是修饰宾语的定语从句。后面的成分都是修饰宾语。你觉得呢？

２．Ronald Reagon had served two terms as governor of California before______president.

     A. he became

     B.became.

这里应该是before引导的壮语从句。后面应该是完整句。你觉得呢？