Ответ:

was

were you....?

left, was

has not come yet

has he gone already?

when did you see him last?

i have not seen him for ages

has improved, saw

felt, went

where have you spent...?

have you ever spent...?

met

i have never visited that place

visited

have just got

have you taken...?

Объяснение:

Past Simple используется когда действие происходило в определенном времени в прошлом.

Present Simple используется для действий, которые начались в прошлом но еще не закончились, или же результат очевиден в настоящем. (неопределенное время)