【推荐2】我不知道这本书是否对你的英语学习很有用。
I have no idea ________________ to your English study.

【推荐3】We haven’t decided if we will visit the museum next week. （同义句转换）
We haven’t made________ ________ ________we will visit the museum next week.

【推荐1】This old song ____________(对……来说是熟悉的) those Chinese people who lived in the 60s. (根据汉语提示完成句子)

【推荐2】毫无疑问，懂得一些急救知识很有必要，因为危险无处不在。
____________ ___________ ___________ ___________ that it is necessary to know some knowledge of first aid as dangers lie everywhere.

【推荐3】我试着学习怎么吹走她，但经过好几个小时的努力，我只能确信我永远都无法用这个乐器发出乐声！
I tried to learn how to play it, but after trying for hours, I ______ ______ ______ I could never make a musical sound with this instrument.