It was playing computer games_______ cost the boy plenty of time______ he ought to have spent doing his homework.
| A．that; that | B．which; that | C．which; when | D．that; when |
The lost car of the Lees was found _____ in the woods off the highway.
| A．vanished | B．abandoned | C．scattered | D．rejected |
Our research has focused on a drug which is so _____ as to be able to change brain chemistry.
| A．powerful | B．influential | C．monstrous | D．vigorous |
The boy slipped out of the room and headed for the swimming pool without his parents' _____.
| A．command | B．conviction | C．consent | D．compromise |
In this factory, suggestions often have to wait for months before they are fully _____.
| A．admitted | B．acknowledged | C．absorbed | D．considered |
. Jim isn't _____, but he did badly in the final exams last semester.
| A．gloomy | B．dull | C．awkward | D．tedious |