I DON’T BELIEVE ... THE EXISTENCE ... UFOS ...EARTH. A. IN/OF/ON...

362. - 1000 CAU TRAC NGHIEM TIENG ANH ON THI THPT QUOC GIA CO DAP AN
1000 CAU TRAC NGHIEM TIENG ANH ON THI THPT QUOC GIA CO DAP AN

362. I don’t believe ... the existence ... UFOs ...Earth.

A. in/of/on

B. in/on/of

C. of/in/on

D. on/of/in