________ the machine begins to work, you can’t stop it _____.
| A．While; soon | B．For; right away | C．Once; at once | D．Until; immediately |
The work was difficult, but Tom’s ____expression showed that he would finish it in time.
| A．stubborn | B．determined | C．concerned | D．surprised |
Tim’s house in NY is much smaller than ours, but it's three times ______ expensive．
| A．very | B．so | C．too | D．As |
They are talking excitedly about the writers and their books ________ interest them.
| A．who | B．whom | C．that | D．Which |
My English teacher insisted that the exercises ____very difficult and that we ____them carefully.
| A．were; must finish | B．be; finish |
| C．were; finish | D．be; finished |
Last night I came across the man ____ you think is pleasant to ________.
| A．who; get along | B．whom; get along |
| C．who; get along with | D．whom; get along with |