48. I'll meet you ______ the supermarket _______ the fountain.
A. at - next to B. at - between C. behind - on D. in front of - in
49. Their family photographs are displayed ______ the wall.
A. above B. under C. in D. on
50. She arrived _______ London _______ March 2023.
A. at - an B. in - in C. at - at D. on - in
