How long have you been here? — _____ the end of last month. [ ]

You won’t have the chance to succeed when you ________.

To my mind, she is the most wonderful teacher that I’ve ever known, _________ is able to get across to her students ________ she really thinks and means.

What did you do yesterday?—My brother took two friends of ________ to play chess with us. But I don’t’ know _______ of them.

Excuse me. I want to buy some stamps. Where can I find a post office?—I know _______ is not far from here. You can easily find _______.