“Freeze, you guy! _______ , and I’ll shoot you.” an old man with a gun in hand shouted at me.

I feel uncomfortable each time I remember the situation _____ Mary didn’t agree with me _____ the matter.

_____seems _______something unusual in his eyes.

      takes me several hours      my tasks. Because they are too difficult.

Though great efforts have been      on their study , Annie still can’t make any improvements , which makes her parents greatly ______ .