1.If we run,we ___(catch)the early bus.2.She noe ____ ____a math teacher in a high school(他现在

If we run, we will catch the early bus.
She now serve as a math teacher in a high school.原因if we run是虚拟语气，前半句用一般现在，后半句则是将来时。第二个句子如果是两个空格的话，serve as就是作为。。。（职业）意思。