___How time flies!It’s already twelve o’clock. ___ Oh,really? I ______ it at all.

Is this your book, Alice? —Yes, it is ____ book. Thank you.

Did you pass the exam? —Yes, but I can’t pass it _____ the teacher’s help. [ ]

The main unit _________ all the computer’s electronics.

Here is a recipe _____ a great turkey sandwich! [ ]