Brendan hurriedly got to the airport, only ______ the plane had taken off.
| A．to find | B．to finding | C．to be finding | D．to have found |
. As a teacher, he has never given his students so difficult a problem ____ they can’t work out.
| A．if | B．that | C．when | D．As |
. — I don’t know ____ to join the army or to find a job.
— Why don’t you ____ your parents’ advice?
| A．if; take | B．if; follow | C．whether; give | D．whether; seek |
. Whether ways will be found to stop pollution or not is just ____ worries the public.
| A．why | B．which | C．that | D．What |
. We called the First-Aid Center ____ the traffic accident happened.
| A．immediately | B．shortly | C．quickly | D．Hurriedly |
. The young man always believes in ____ she says or she does because he loves her so deeply.
| A．however | B．whatever | C．no matter what | D．no matter how |