词汇知识____________(vt.)温习(功课)____________(n.)纪律____________(n.)关系____________(adj.)正式的→____________(反义词)____________(adj.)轻松的;松懈的;宽松的→____________(adj.)令人放松的;令人轻松的____________(adv.)同样地,类似地→____________(adj.)
Three thousand ______(听众) crowded the concert hall.
The young couple are always ______(争辩) with each other about money.
We should care for the young and ______(尊敬) the elderly.
The police ______(观察) a man in black entering the bank.
It costs me a lot to travel around the world, but it was really ______(值得的), for it broadened my views.