He will never pass the test if he (not work)............................hard
does not work
Let's (go) -----...............................-----some where for a drink
 go
Do you mind if her brother (try)..........................his best for his final exam?
 tries
He went on (work)...........................though it started to rain
 working

does not work hard.
go somewhere for a drink.
tries his best for his final exam?
working though it started to rain.