When we were seniors in our university, we (do) …………… many presentations that were related to our major.
did
Smartphones (be) …………. not popular fifteen years ago.
were
Last year, I (go) ……….… on a trip to Ho Chi Minh City in my summer vacation and that trip was the most memorable one that I have ever had.
went
He (use) ……….…. to be a very famous actor in the 1990s.
used
One of the most terrible natural disasters is the earthquake that (happen) ……………… in Japan in 2011.
happened
The percentage of men working at night …………….. (rise) to 20% in 2010.
rose
By 2000, smartphones …………………………….. (not become) popular in Vietnam.
had not become
In 1998, the number of fast-food consumers in America ……………….. (increase) dramatically.
increased
By the beginning of 2009, the price of oil ……………………….. (drop) by roughly $90.
had dropped
By 2007, the average price of a computer ………..…………….. (rise) by almost £19,000.
had risen
