句子This is an MP4.和This is a MP4.哪句话正确

句子This is an MP4.和This is a MP4.哪句话正确 This is my own MP4.(使两句意思相同或相近,每空一词） This is an MP4------ ------- ------- this is a free mp4什么意思 This is an apple 变为复数句子 初中英语41. is this MP4 player ___you bought for your son for his birthday?a the one b that c which d what请翻译句子和选项并加以说明原因谢谢 This is the very MP4 which i find. this is an order.中is 和an要连读吗? This is an red apple.写出正确的句子 英语单词连成句子This an office building is This is an useful tool.这个句子哪里错了? 英语a mp4还是an mp4? my birthday is september 25th和my birthday is on september 25th这两个句子哪个正确? Is this an egg? this is an easy this is an Is this an eye? Is this an umbrella this is an