When _______ difficult exercises, Lan always tries to complete them on her own.

When _______ , a majority of senior students expressed their great uncertainty about the future.

When _______ an order, please remember to include your name and address.

_______ his mistake, Tim apologised to me.

_______ to play the violin for more than five years, Jane is confident to perform in public.

If _______ with flowers and balloons, this room will look more appealing.

_______ the shocking news, she fainted and became unconscious for about half an hour.

_______ from upper secondary school, Nam decided to study overseas.

_______ the Youth Club, he became more confident and sociable.

_______ the award, she is now a much sought-after film actress.

Although _______ the most delicious dish in the South, it isn’t very popular in the Northern part of the country.

If _______ as the president of the country, he promises he will do his best to revive the national economy.

_______ 15 litres of drinking per day, the machine suddenly stopped working.

_______ the appetizer, I felt sick and didn’t want to eat more.

Once _______ with essential skills, these interns will know how to prepare a report.