_______his thoughts, the scientist didn’t notice what had happened before him.
| A．Absorbed in | B．Caught in |
| C．Used to | D．Interested in |
We have got everything ready and all of us are waiting for you. You should have _____ quickly for the trip to Guangzhou.
| A．wrapped | B．tied | C．packed | D．carried |
He_____ me 50 yuan and didn't return it to me until last night.
| A．owed | B．lent | C．paid | D．borrowed |
Our teacher will _____ our class a picnic at the riverside tomorrow if the weather permits.
| A．organize | B．order | C．arrange | D．operate |
John complained to the bookseller that there were several pages _______ in the dictionary.
| A．missing | B．losing | C．dropping | D．leaking |
--- Who broke the window? --- I _____.
| A．had | B．broke | C．was | D．did |