Mr Black has two sons, one of ________working as a doctor.
| A．them | B．who | C．whom | D．whose |
The new secretary has written a remarkably _____ report only in a few pages but with all the details.
| A．concise | B．clear | C．precise | D．elaborate |
The ship was _____ in a storm off Jamaica.
| A．drowned | B．sunk | C．wrecked | D．submitted |
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 |
We won't know whether it will be successful. We won't know whether there will be good _____.
| A．ends | B．results | C．effects | D．causes |