Puzzle

【明報專訊】■Clues Across

（1）Part of a bird's wing.

（5）Negative: There are _______ chairs in this room!

（6）To get bigger, taller, more beautiful... and older.

（8）An exactly repeated sound.

（9）Initials for the person in charge of a group of soldiers: the commanding officer.

（11）An undefined person: "Who's there? I thought I heard _______ in the hall."

■Clues Down

（1）Four quite thin things at the end of each hand.

（2）The first part of this sentence means "usually" : "_______ a rule, I never use taxis!"

（3）This could be the opposite of easy.

（4）He made many mistakes in his letter so he _______ it.

（7）The object form of the word that means "those people".

（10）If I think something is for you to decide, I might say, "It's up _______ you."