We want to know whether the drug has an effect _______________ people's health.
His illness his absence.
When the man was trying to break into the bank, he was caught by the police.
My best friend who _______ a rich man two years ago has a baby now.
It snowed heavily; ______, lots of flights have been put off until further notice.
She is a woman of strong ______ and we all believe she will be a good leader.