Question 1
Which happened earlier?
A
Heathrow Airport opens
✓ Earlier
B
Charles de Gaulle Airport opens
Heathrow Airport opens (1 January 1946)
came before
Charles de Gaulle Airport opens (1 January 1974)
Question 3
Which happened earlier?
A
Incheon International Airport opens
B
Hong Kong International Airport opens
✓ Earlier
Hong Kong International Airport opens (6 July 1998)
came before
Incheon International Airport opens (29 March 2001)