A detailed investigation __________ after every accident or near miss which takes place in or near the airport.
a) carries out b) is carrying out c) is carried out
A detailed investigation __________ after every accident or near miss which takes place in or near the airport.
a) carries out b) is carrying out c) is carried out
c) is carried out
b) is carrying out
bởi vì trên mặt ls thuyết thì dùng cụm từ này là hợp lý