Tooth brushing was common by the 1930s, after which toothpaste sales leveled off even thought the advertising, of course, continued.
句子里after后面的句子是名词性从句吗?如果翻译成"在哪个牙膏销量趋于稳定后…"的话,把which改成some可以吗?
Sea level of the magnitude now anticipated will be destructive to natural systems and living things and ______ to human as well. 这句话填hence,为什么so是连词就不能填只能填副词?连词可以省略成分啊?
At the national level, the scores of 13 of the 17 SDGs improved
over
time, but
the
scores of four SDGs declined. 这里over time做了improved的宾语是怎么回事?介词短语可以做宾语的吗
He liked a wild life and Peru was much more like the country of giants where Tom had found him, than any place the big man had since visited.麻烦老师们帮我分析下since在这里的用法。这里的since可以理解为ever吗?
You see the vegetation‘s changed hugely.really long grass.And immediately this feels like an area which could harbor wildlife.这里的vegetation‘s changed怎么理解,在名词后面加s不就是所有格了吗?is动词不可以缩写吧?
It was next to a piece of paper with a very strange message on it.请问老师这里如果去掉on it 变成paper with a very strange message 可以吗?with本身不就有"有"的意思吗,例如 a man with a book,这两个结构有什么区别呢?