:Đ Our national football team lost the match. Coach Nguyen Huu Thang soon decided to resign.  -> Hardly ______________________________

Hardly had our national football team lost the match when Coach Nguyen Huu Thang decided to resign.

In this sentence, we use the expression "Hardly... when" to indicate that one event (the coach's decision to resign) happened almost immediately after another event (the team's loss). This construction highlights the quick succession of events, emphasizing that the coach's resignation followed closely on the heels of the team's defeat. In English, "hardly" typically sets up a structure that suggests a shocking or unexpected reaction to a preceding condition.