Studies show the MP3 people have made much use of ______ music may be causing hearing loss in many people.
| A．enjoy | B．to enjoy | C．enjoying | D．enjoyed |
A fifteen- year-old girl came _____ to the bus stop only ____ the bus had gone.
| A．running, to find | B．to run, to find | C．and run, found | D．running, finding |
Steven has a lot of work to ______ in the office since he has been away for quite a few days.
| A．take up | B．make up | C．work out | D．carry out |
The student became ______ the danger of smoking and decided to give it up.
| A．aware | B．aware that | C．aware of | D．aware with |
The police are looking for a missing boy, who is believed _______ a white pullover and a blue jeans.
| A．wearing | B．to be wearing | C．to wear | D．having worn |
----Have you seen _____ pen? I left it here this morning.
----Is it ____ black one? I think I saw it somewhere.
| A．a, the | B．the, the | C．the, a | D．a, a |