Helen __________Gray ______ she left college.

I was surprised by her words,which made me recognize ______ silly mistakes I had made.

________ the explanation of the book, we finally understood the meaning of the passage[ ]

Have you finished your homework yet?—Not yet. I ______ to do it just a few minutes ago.

There is somebody waiting for you, _________ I thinkmight be one of your classmates.