_______that I could use a kite to attract lighting, I decided to do an experiment.
Our special thanks go to thousands of volunteers, without ________tireless work, none of this would be possible.
If there hadn’t been so much smog in Beijing, we______________ the beautiful scenery across the Tiananmen Square.
No worker and no engineer who it is that is for the explosion of the chemical factory.
_____we promise continuous increase in rural incomes _____improve the whole people's well-being.
---- What was it that made Susan weep? ---- ________of cheating in the exam.