How much is a Second Class stamp? <a href=" http://www.bartoszkolata.com/propecia-generic-finasteride.pdf ">can i buy finasteride over the counter uk</a> In this case, the noun "student" is singular and the pronoun "they" is plural. They should either both be either singular or both be plural in order to agree. The corrected sentence would read, "A student has to follow these five tips before she can finish the application process."