_________ difficult the task may be, we must finish it on time, because we can’t meet such a precious opportunity _______ we have expected.
| A．Whatever; that | B．However; as |
| C．However; that | D．Whatever, which |
Though bought several years ago, the computer is still in good ____.
| A．situation | B．condition | C．standard | D．position |
I ____ in London for many years, but I’ve never regretted my final decision to move back to China.
| A．lived | B．was living | C．have lived | D．had lived |
The man in black was about to set fire to the house ____ the police came.
| A．while | B．after | C．before | D．when |
. I walked out of the cinema, _____ I’d never come back to this hell.
| A．determining | B．determined | C．to determine | D．determine |
Three hundred firemen raced to the hotel after a smoke detector(检测器)_____ the alarm soon after midnight.
| A．set out | B．set off | C．give away | D．give off |