把我们的失败归罪在他头上是没用的。
It's no use______________  our defeat ______________ him.
二氧化碳由碳和氧组成。
Carbon dioxide ______________  _________ carbon and oxygen.
如果想赶上别人，就全神贯注于学习。
______________  _________  your study if you want to catch up with others。
他不仅写歌词而且谱曲。
Not only ______________ he _________ the words to the song, but also he composes the music.
任何教师都不能允许考试作弊。
No teacher can ______________  _________ cheating in exams.