They _______ on the program for almost one week before I joined them, and now we on it as no good results have come out so far.
| A．had been working; are still working |
| B．had worked; were still working |
| C．have been working; have worked |
| D．have worked; are still working |
12. We can’t continue to pretend that the problem of homelessness doesn’t ______ in this city.
| A．exist | B．live | C．be | D．Survive |
11. The pilot, whether ______ or design, made the plane do a sharp turn.
| A．by accident | B．at times | C．suddenly | D．all at once |
10. Then you usually lie there just ____ the ceiling, thinking about everything that could go wrong.
| A．glancing at | B．watching at | C．glaring at | D．staring at |
9. _____frightened us ____the electricity was suddenly cut off, which threw all of us into the dark.
| A． It was; that | B．What was; most was that |
| C． It ; most what | D． What; most was that |
8. He wants to see changes in the company and I am sure he will, ______.
| A．on time | B．at a time | C．at one time | D．in time |