—Tom, you look tired this morning. What’s wrong?—I was so busy that I didn’t go to bed________12 o’clock last night.
Everyone passed the exam ________him. So he was sad.
I find ________ difficult to remember everything, though I’m still young.
It’s an ________well (井). Stay away from it.
The twins may look the same _____ each other, but they are different ______ many ways.
There is ______ in today’s newspaper.