55、What letter is a question?It's______
54、There are not 26 letters in English .How many letters are there in it?There are___
53、What's the end of the world?It's ______
52、( )首席执行官 J WTO
51、( )香港 I VCD
50、( )世界贸易组织 H NBA
49、( )影碟播放机 G PRC
48、( )身份证 F ID
47、( )中国 E BBC
46、( )急救遇难信号 D HK