The members of the club wouldn't run a _____ in entrusting（委托） the organization to an unreliable person.
| A．danger | B．risk | C．loose | D．chance |
------ What do you think of the English dictionary?
------Not bad. You can’t find ______ in the bookstore.
| A．a good one | B．the good one | C．a better one | D．the best one |
It was a time_______ the killer whales helped the whalers catch the baleen whales.
| A．when | B．that | C．then | D．which |
Ladies and gentlemen, please remain ______ until the plane has come to a complete stop.
| A．seated | B．seating | C．to seat | D．seat |
_______ a certain doubt among the people as to the practical value of the project.
| A．It has | B．They have | C．It remains | D．There remains |
The how-to book can be of help to ______ wants to do the job.
| A．who | B．whomever | C．no matter who | D．whoever |