摘要：不用冠词的序数词. 序数词前有物主代词.如:my first trip 序数词作副词.如:He came first in the race. 在固定词组中.如:at(the)first.first of all.from first to last
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把下列短语译成汉语，注意介词和冠词的用法。
(1)move downtown ________
(2)go up and down in the room ________
(3)go westwards ________
(4)invite suggestions from sb．________
冠词的使用
For further information, contact us by ________ following E-mail address
| A．one | B．a | C．the | D．/ |