单选题 John is a successful businessman, but his recent failure in business brought him to the ______________ of ruin.

单选题 The mystery got ________________ after he explained the issue we were confused with.

单选题 Entertaining, as is the law of gravity, is ___________________.

单选题 He fell in love with her at the first sight, and the affection was ______________.

单选题 _____________ with database systems would be an advantage for you to apply for this job.

单选题 The poor girl ____________ fear in her eyes at the attacker.

单选题 She believes that fine food and wine are beyond taste of the ______________.

单选题 The ______________ of how the talented student deteriorates so fast reveals that he was overwhelmed by the divorce of his parents and has formed a suspicious attitude toward the people around him.

单选题 The administrative ____________ helps quicken the speed of economic development.