包括: 9 z! O6 l5 {& j( h5 l }focus 2:Academic listening and speaking skills9 w& s0 T8 y h* A/ `% J: O
focus on vocabulary0 f" W- j- _$ n4 [/ q% H& x
more reading power(second edition)1 U# N0 S" [9 ?6 z/ x# h; f6 r
focus on grammar 5(third edition)7 F4 l/ Q/ n5 k R
grammar and writing; z( C) g* l C) v8 M N9 j; a
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