Be sure to practise all your language shills-_,readingBe sure to practise all your language shills__,reading,writing,listening and speaking-in every lesson.A that is B this is C it is D they are

Be sure to practise all your language shills-_,readingBe sure to practise all your language shills__,reading,writing,listening and speaking-in every lesson.A that is B this is C it is D they are be sure of 和 be sure to be sure to do Be sure to practise all four language skills -__,reading,writing ,listening and speaking为什么要用that is 不用they are ,this is 讲一下做法 用Be sure to、Be sure to do 、Be sure of、Be sure that 造句 be sure to do sth. be sure to go there they are sure to be make sure,be sure of ,be sure to do,for sure的区别 be sure of be sure to do 的区别· 辨析 be sure of 与be sure to do sth be sure to 和be sure of 区别和用法 be sure to/be sure of举例区别 be sure to 与 be sure of 的区别 Be sure of与Be sure to有什么区别 祈使句时 是to be sure 还是 be sure 辩析be sure to do sth be sure to do sth be sure that+从句 be sure to be there on 同上