“ Although ,” the boy said , “ _______ over and over , the maths problem remained confusing to me ” .
| A．explained | B．explain |
| C．explaining | D．having explained |
He looked at me with that special expression ___ his face.
| A．in | B．on | C．onto | D．into |
Teacher: “Hi. Bob, ___ the poem” Bob: “I am sorry, sir, I can’t.”
| A．learn by heart | B．remember | C．recite | D．memorize |
--Who is ___?--- ___ is me, jim.
| A．it, It | B．it, He | C．she; She | D．It, it |
Alice fixed her eyes upon Bob, there was an expression __ that he could not understand.
| A．in it | B．on them | C．in them | D．on it |
Oh, Tom your face is very dirty.Look at yourself ___ the mirror.
| A．on | B．at | C．in | D．under |