1. Jill and Tony are flying to London . two months ago
two months ago
tomorrow
yesterday
two weeks ago
2. We haven’t seen grandmother .
yesterday
next week
tomorrow
since last Spring
next month
3. While we the Internet,we came across some very useful web sites.
are surfing
have surfed
surfed
were surfing
surfing were
1. Tomorrow
2. Since last spring
3. Were surfing