_______that I could use a kite to attract lighting, I decided to do an experiment.
Despite his great efforts,he ______unsuccessfully after all.
—How______do you attend the evening classes?—______,three times per week.
When they had finished playing,the children were made to ______ all the toys they had taken out.
A sudden blizzard occurred in Beijing last night,______great inconvenience in transport.
Thirty soldiers were killed and many more were ______.