If it were not for the fact that she_______sing, I would invite her to the party. 

—What happened to the young trees we planted last week?—The trees ____ well, but I didn’t water them.

In this company, it is required that anyone who ______ recently come here _____ this kind of test.

I ________ you how to deal with the matter, but why didn’t you ask me?

The librarian insists that John _____ no more books from the library before he returns all the books he has borrowed.