IT'S A LONG TIME SINCE LONDON ______IN ONE OF ITS INFAMOUS PEA-SOU...

19. - 25 DE THI HOC KI 1 MON TIENG ANH LOP 12 CO DAP AN
25 DE THI HOC KI 1 MON TIENG ANH LOP 12 CO DAP AN

19.

It's a long time since London ______in one of its infamous pea-souper fogs.

A. enveloped

B. was enveloped

C. has enveloped

D. has been enveloped