【23】A．additionB．briefC．generalD．fact

【C10】A．criticalB．interestingC．generalD．impossible

【C2】A．additionB．replyC．turnD．return

【C19】A．universalB．commonC．generalD．ordinary

【C6】A．In factB．In additionC．In generalD．In theory

【C19】A．normalB．usualC．generalD．average

【C18】A．By contrastB．In a wordC．In generalD．By the way