The students _______ busily when Miss Brown went to get a book she _______ in the office.
| A．had written, left | B．were writing, has left |
| C．had written, had left | D．were writing, had left |
All is needed is a supply of oil.
| A．the thing | B．that | C．what | D．which |
—Can I help you?
—I want to buy a blue tie to my shirt.
| A．fit | B．match | C．suit | D．be fit for |
----We’ve spent too much money recently.
-----Well, it isn’t surprising .Our friend and relativesaround all the time.
| A．are coming | B．had come | C．were coming | D． have been coming |
from the top of the tower ,the south foot of the mountain is a sea of trees.
| A．Seen | B．Seeing | C．Having seen | D． To see |
In the dream Peter saw himself by a fierce wolf and he woke suddenly with a start.
| A．chased | B．to be chased | C．be chased | D．having been chased |