包括:% `4 ^" S5 {% Y
focus 2:Academic listening and speaking skills7 J. w' I3 k: E) w4 E# B' l
focus on vocabulary1 j6 c3 _, t/ Z: c( M
more reading power(second edition)* ^/ |/ L! s! Q9 I2 f) B
focus on grammar 5(third edition)1 G0 `) P+ d* d$ Y, ]5 U, R, Z
grammar and writing/ W% [6 W9 F- {
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