The bell rang and came in Mr. Brown, _____ a book in his hand. Then the class began.
| A．for | B．when | C．with | D．while |
Look, _______ fashionable clothes is he wearing that all the eyes are fixed on him!
| A．so | B．what | C．how | D．such |
The watch was very good, and he _______ 20 percent down for it.
| A．paid | B．cost | C．bought | D．spent |
When the post fell _______, Dennis Bass was appointed to fill it.
| A．empty | B．blank | C．vacant | D．bare |
Try not to cough more than you can _______ since it may cause problems to your lungs.
| A．check | B．allow | C．stop | D．help |
— Why on earth didn’t you answer the door?
— I’m terribly sorry, but the telephone _______, too.
| A．is ringing | B．was ringing | C．rang | D．was about to ring |