Let Tom _____ right away.

I ______ this black bag in the library. Is it yours

Do you think he will make a good teacher?–Yes, I believe he is ________ any good teacher

下列括号内的缩句，与原句意思基本想符的一项是（ ）

Jack can’tconcentrate on his lessons recently.— Yes, that might____why he did so badly in thelast test.[ ]