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 |
Beginning college is exciting：many of us can be easily overwhelmed by _______ details of running ________ well-balanced life.
| A．／; the | B．the; a | C．／; a | D．the; ／ |
With all the novels he was interested in ___, he left the library and went back to his dorm.
| A．borrowed | B．borrowing | C．to borrow | D．borrow |
Have you noticed the problem ___ he is now in low spirit ? ____ come?
| A．where, What | B．that, How | C．in which, For | D．what, As |
We have gathered nearly 100,000 quilts, ___ up to half have gone to the flood-hit areas.
| A．with which | B．in which | C．for which | D．of which |
Price is not the only thing customers consider before ______ what to buy.
| A．deciding | B．decided | C．to decide | D．having decided |