--- How long do you think it is he arrived here? --- No more than half a year, I believe.
--Were you in time for the meeting? -- If I _________earlier, I would have .
-- I am going to Sidney for further studies next month. -- That's fantastic. Can you keep emailing me ______ you are there?
The well was found __________ when we got there.
Tom, ________________ you from taking a hand in that affair, you ______________ in prison.
The group’s research has done much toour knowledge of the HIV virus.