He's good at Maths.It's easy for him to work out such a Math

5个回答

  • a maths problem.这个就不用解释了吧,不明白没关系,与其等着记忆大段的解释不如就记住maths problem这个搭配就完事儿了.

    the water here is dirty.here强调是这里的水,于是要有定冠词the出现,然后water是不可数名词,前面不会出现a

    the children are excited to play in the water.说的是小孩很激动,excited人激动,exciting让人激动的.此处要用形容词.so~