He(to answer) question correctly since the beginning of the tournament. when he (to two days ago, hundreds of fans (to the station to welcome him. since his arrival he (to in his hotel bedroom. if things (to for him, he (to become) first prize winner. he (to reply to seventeen thousand questions tomorrow and no meal breaks (to plan)

1)answers 

2)arrived 

3)were waiting

4)had read

5)would go

6)would become

7)would have 

 в ответах не уверен,ибо не знаю,какая точно это тема)

Has been answering (since-признак Perfect)

Arrived (When-признак Past Simple)

Were waiting (Прерваное действие-одна из речевых ситуаций Past Contineus

Has been reading

Go (1 conditionals)

will become (1 conditionals)

will have to

plans