_______ puzzled Li Lei a lot was _______ his best friends didn’t come to school this morning.
Don’t put your glasses here.You had better put ___away.
He looked at me with that special expression ___ his face.
Teacher: “Hi. Bob, ___ the poem” Bob: “I am sorry, sir, I can’t.”
--Who is ___?--- ___ is me, jim.
Alice fixed her eyes upon Bob, there was an expression __ that he could not understand.