very useful等于什么?要3个单词的

very useful等于什么?要3个单词的 The book is very useful.请问useful在句中修饰什么?、 the c----- is very useful中间填什么 The__is very useful无 English is very useful l ,I think要快! the c---- is very useful very useful for giving workshops? Fire can be very useful very good 等于什么 well is very useful to us all.前面填speak,english,的什么形式呢 it's true that some ads can be very useful.什么句子 English is very useful in the m_____ word .m 开头的适合填什么词? I bought some books xxxxxxxxx were very useful.填什么,是which还是that? Useful Sentences和Useful Sentences什么意思? useful什么意思 useful什么意思 useful什么意思啊 用useful,are,very,computers,helpful,and.组成一个通顺的句子.3Q