The president spoke at the business meeting for nearly an hour without ___ his notes.
| A． bringing up | B． referring to |
| C． looking for | D． trying to |
The parents felt helpless when they found their son ______ drugs.
| A．addicted | B．addicted to |
| C．addicted himself | D．addicted himself to |
To keep fit, you should take more______ . Don’t be always busy doing your ______.
| A．exercise; exercise | B．exercises; exercises |
| C．exercises; exercise | D．exercise; exercises |
Was it her fluent English at the job interview _______ impressed the manager?
| A．which | B．what | C．who | D．that |
I think you should end it _______ it’s too late, or you may be sorry about it later.
| A．after | B．when | C．until | D．before |
The doctor could ______ by the symptom that the patient caught flu.
| A．observe | B．say | C．tell | D．speak |