【C15】A．cruciallyB．fatallyC．profoundlyD．apparently

【C15】A．causeB．courseC．cautionD．case

【C15】A．installmentB．expeditionC．analysisD．option

【C15】A．orB．andC．soD．then

【C15】A．whileB．afterC．beforeD．over

【C15】A．withB．inC．asD．like

【C15】A．puzzledB．confusedC．troubledD．disturbed