Only when we begin our college life______the importance of English.
| A．we realize | B．we will realize | C．have we realized | D．do we realize |
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 |
A good deal of money ____spent on books.
| A．have | B．has | C．have been | D．has been |