She may have missed the train, in _____ case she won't arrive for another hour.
| A．whose | B．that | C．which | D．what |
The only means to achieve success ___ to appeal to arms.
| A．is | B．are | C．were | D．have |
One or perhaps more pages _______.
| A．is missing | B．has been missed | C．are missing | D．was missing |
The Smiths ______ their breakfast when the doorbell rang.
| A．had | B．has been having | C．are having | D．were having |
The majority of doctors ______ smoking is harmful to health.
| A．are believed | B．had believed | C．has believed | D．believe |
EitherJimorI ____goingtohelpthefarmerswiththeorangeharvestthisafternoon.
| A．was | B．am | C．is | D．are |